Elastomer Compounds Chemical Compatibility

A technical guide to 

Elastomer Compounds 

and 

Chemical Compatibility 

Precision Polymer Engineering Ltd

The contents of this document are confidential to and the copyright of Precision Polymer Engineering Limited (PPE). No use of all or any part 

of this document or the designs, drawings, concepts, representations, specifications and ideas set out in this document can be reproduced 

without the prior written permission of PPE nor may it be made available to any third party with a view to such third party carrying out work 

based upon the contents of this document. © Precision Polymer Engineering Limited. May 2006. All rights reserved.

Precision Polymer Engineering Ltd 

Contents 

A Technical Guide to Elastomers 

Contents 

1 Introduction 4 

2 Why use PPE 5 

3 PPE Services 6 

Component design and computer modelling 6 

Polymer materials consultancy and testing 7 

Online seal selection resource for engineers 9 

4 Perlast ® high performance perfluoroelastomers 11 

5 How to select the correct seal 12 

6 Elastomer compound types & typical properties 14 

Material temperature comparison graph 18 

7 Industry specific elastomers 19 

8 Elastomer trade names 22 

9 Chemical compatibility guide 23 

10 Elastomer terminology & definitions 47 

11 O-ring groove design guidelines 52 

12 O-ring moulding tolerances 54 

13 International standard O-ring sizes 57 

14 A-Z index 65

Introduction 

Precision Polymer Engineering Limited 

delivers elastomer sealing solutions to 

the world’s leading industrial markets. 

Founded in 1974, Precision Polymer Engineering Ltd 

(PPE) has over 30 years experience in designing and 

manufacturing high performance O-rings and 

technical elastomer components. 

With an unrivalled materials range of over 350 

different compounds, PPE has an elastomer for 

every application. 

The combination of advanced materials, technical 

expertise, rapid tooling, design and manufacturing 

support services is unmatched in the sealing industry. 

This guide describes the different types of 

elastomer available, their typical characteristics 

and chemical compatibility, plus factors to 

consider when selecting an elastomer for a 

particular sealing application. 

Industries in which PPE has supplied sealing 

solutions include: 

• Aerospace 

• Bio-analytical 

• Chemical Processing 

• Food, Dairy and Brewing 

• Marine Diesel Engines 

• Military / Defence 

• Nuclear 

• Oil and Gas 

• Pharmaceutical 

• Power Generation 

• Semiconductor 

• Water 

Seals and components any size, any geometry. 

PPE can provide an infinite number and variety of 

fully moulded parts including: 

• O-rings (0.25mm up to 2m diameter) 

• Flat Seals & Gaskets 

• Diaphragms 

• Pipe Couplings 

• Flanges 

• ‘X’ rings 

• Hygienic seals 

• Inflatable seals 

• Pneumatic seals 

• Micro parts 

• Bonded parts (onto metal or plastics) 

• Fabric reinforced parts 

• Composite parts 

• Custom designed parts 

4

Question: 

What if you could extend maintenance cycles, optimize 

process conditions, reduce cost of ownership, and/or 

increase the efficiency, performance and reliability of your 

equipment 

PPE gives you access to the latest skills and expertise in 

elastomer technology to ask “what if” 

With many years experience across a wide range of industries, 

PPE can make a valuable contribution to 

your business and help you achieve your goals. 

PPE aims to become the partner of choice for original 

equipment manufacturers, end-users and distributors around 

the world. If you are interested in developing your “what ifs” 

into viable business solutions, call PPE today on: 

+44 (0) 1254 295400. 

Standard and non-standard O-rings 

High performance, fully moulded O-rings are manufactured to 

order and available in an infinite range of sizes between 

0.25mm and 2000mm internal diameter, with order quantities 

ranging from 1 to medium volumes. 

Range of materials 

With a range of over 350 high performance elastomers on offer 

and an extensive knowledge base of material compatibility and 

performance, PPE ensures the perfect match of material to your 

application. Every year we develop many new compounds and 

sealing solutions, so if the ideal sealing material has not yet been 

created, we can develop it for you. 

Material approvals 

From the 17 elastomer types detailed in this brochure, PPE 

offers many that meet various international approvals and 

conformance requirements, such as FDA, USP Class VI, 3-A, 

WRC, DTD, MIL and NES 337, enabling PPE to provide superior 

sealing solutions that meet the needs of specific industries. 

Lead-times 

Responsive rapid manufacturing service and express delivery 

enable parts to be supplied with some of the shortest lead times 

in the industry, measured in days rather than weeks. 

Technical design service for customised 

solutions 

Problem solving is central to our culture, providing customers with 

optimal design solutions which exceed expectations. PPE has the 

ability to produce and import electronic Computer Aided Design 

(CAD) drawings using the latest software, as well as using 2D and 

3D Finite Element Analysis (FEA) modeling to explore ‘what if’ 

scenarios, ensuring the final seal design is right first time. 

(See page 6 for more details). 

Why Use PPE 

Technical Support 

Support and expert technical advice are always on hand at 

PPE. Our engineers and material technologists are able to 

provide support on component design, material selection and 

compatibility, testing and analysis. Our consultancy service 

and field support includes on-site assistance with problem 

solving and troubleshooting. 

In-house tooling 

Tool design and manufacture is undertaken in-house using the 

latest CAD and CNC machining techniques. This allows PPE 

to manufacture competitive tooling within hours of the initial 

design concept, which results in exceptionally short lead times 

for non-standard and custom designed components. 

Manufacturing facilities/capabilities 

PPE’s manufacturing facility contains some of the most 

advanced equipment in Europe, with the capability of 

producing fully moulded rubber components up to 2 metres in 

diameter. In addition, critical parts are manufactured in a clean 

room environment and a policy of continuous improvement, 

supported by extensive investment in facilities, promotes 

constant efficiency improvements. 

In-house test capabilities 

Equipped with a state-of the-art Materials Characterisation Centre 

and latest test apparatus, PPE’s Material Technology Department 

can provide a range of services including: material analysis, 

product development, characterisation, testing and detailed 

analysis of polymeric materials. (See page 7 for more details). 

Quality standards 

PPE’s quality systems are third-party registered to BS EN ISO 

9001:2000 and AS9100:2004 with no exclusions to any 

clauses. In addition, PPE is regularly assessed by a wide 

range of customers including leading multi-national 

corporations. PPE offers full batch traceability of materials 

throughout the full production process together with 

certification of conformity supplied on request. 

Training and education 

With the benefit of over 30 years experience in polymer 

technology and precision component manufacturing, PPE 

offers bespoke training courses which are tailored to your 

needs. Our experts will provide delegates with a wealth of 

knowledge relating to polymer and sealing technology, from a 

basic level right up to advanced and specialist subjects. 

Why Use PPE 

PPE offers a ‘One Stop Shop’ for all your elastomer sealing requirements. 

5

PPE Services 

Component design and computer modelling services 

Precision Polymer Engineering Ltd (PPE) offers a 

comprehensive design and modelling service for seals, custom 

moulded elastomers and bonded components. 

Typical services include: 

• Material recommendations, based upon chemical and 

mechanical constraints 

• O-ring size optimisation to maximise sealing efficiency 

and life expectancy 

• Groove size recommendations 

• Custom seal design 

PPE is design-certified to ISO 9001:2000; our team of 

designers captures customer requirements and translates 

these into hardware recommendations and custom 

designs. Various formats of electronic drawings are 

accepted including IGES, STEP, PARASOLID, PRO-E ® , 

Inventor, DXF, DWG, plus many others. These can be 

imported into SolidWorks ® for our team of design 

engineers to work with. Components are designed in 3D 

CAD, and when required, are modelled using FEA. 

PPE engineers design components using SolidWorks ® , which 

offers three dimensional parametric Computer Aided Design 

(CAD) capabilities. Design intent is captured once into CAD and 

then reused to drive all design and manufacturing processes: 

• 2D & 3D non-linear Finite Element Analysis (FEA) 

using ANSYS ® 

• Tool manufacture 

• 3D work instruction generation 

• 2D inspection drawings 

Computer generated model showing an inflatable 

seal for a pharmaceutical application. 

Finite Element Analysis (FEA) 

FEA is used to predict contact forces, deformation and stress levels within the 

component. In order to maximise the accuracy of modelling, PPE engineers 

generate temperature specific material models for specific applications. By 

minimising stresses within an elastomer we can reduce the effect of stress-induced 

chemical attack and therefore prolong the life of a component in application. 

Drawing from a wide range of in-house compounds and a comprehensive supply 

chain, our design team is able to recommend the most suitable materials for your 

application, either using solely elastomers, or augmenting them with metals or 

thermoplastics such as PTFE or PEEK ® . 

Integrated Computer Aided Manufacture (CAM) facilities are used by our 

experienced team of tool designers to ensure that design intent is maintained 

when manufacturing tooling within our in-house tool manufacture facilities. 

FEA rendering showing the equivalent 

stresses produced by the installation, 

and then compression of a seal. 

Full configuration management is maintained throughout the design and 

manufacturing process including the generation of 2D inspection drawings and 3D 

manufacturing instructions. This ensures that requirements are correctly captured 

and that the product we deliver meets the needs defined by our customers. 

By working closely with our customers we can provide technical expertise 

to maximise the performance of our materials in your application. 

Make PPE your sealing partner. 

6

Polymer materials consultancy & testing services 

Precision Polymer Engineering offers an extensive range 

of independent testing and consultancy services for 

companies and organisations which are looking for 

assistance in investigating polymer materials of any sort. 

As our core operations are very closely connected with 

material development, industrialisation and processing, we are 

not just another test house or consultant. We are an ideal 

partner for organisations seeking practical support to solve a 

challenge – be it manufacturing, processing, evaluation, failure 

analysis or optimisation. 

Some of the key testing aspects: 

• chemical compatibility testing 

• failure analysis 

• microscopy 

• thermo-mechanical evaluation 

• physical property determination 

PPE Services 

Testing resources: 

Utilising advanced techniques in material analysis, PPE 

provides material characteristics and test data using the 

following equipment: 

• Differential Scanning Calorimeter (DSC) 

• Thermogravimetric analysis (TGA) 

• Fourier-transform infra-red (FTIR) with attenuated total 

reflectance (ATR) accessory 

• Melt-flow indexer 

• Shore A hardness meter 

• IRHD hardness meter 

• IRHD micro-hardness tester 

• Tensometer, with environmental chamber and laser 

extensometer 

• Reflux and extraction apparatus. 

• Densometer 

• Explosive decompression (ED) testing rig 

• High pressure seal leak testing 

Testing capabilities 

Utilising the most modern analytical techniques, PPE provides 

detailed analysis of materials. This work takes a number of 

different forms: 

Failure Analysis 

A seal that has failed in an application is analysed using various 

techniques to identify the cause and mode of failure. This often 

includes differentiating between thermal and chemical 

degradation and investigating other possible causes - such as 

mechanical failure, environmental stress, premature ageing, 

contaminants/inclusions and poor design. PPE provides 

assistance in recommending alternative designs or materials. 

Chemical compatibility 

Seal materials are often used in unique combinations of fluids 

over a wide variety of temperatures. Test facilities at PPE allow 

chemical compatibility trials to be performed to address 

specific customer needs. Changes in physical properties for 

various materials can be examined and the most cost effective 

solution found. 

Analysis capabilities: 

• Formulation and deformulation 

• Research and development 

• Failure analysis 

• Methods/process development 

• Data interpretation 

• Polymer identification 

• Molecular weight distribution (Rheological method) 

• Chemical composition 

• Thermal analysis 

• Process chemistry and catalyst testing 

• Monomer ratios in mixed copolmers/terpolymers 

• Reaction kinetic studies 

• Dispersion analysis 

• Troubleshooting 

7

PPE Services 

Polymer materials consultancy & testing services 

Thermo-mechanical Evaluation 

Using environmental chambers to test the physical properties of materials at actual or elevated operating temperatures provides 

practical results which are much more representative of real-life applications. The data is then used in computer modelling to create 

accurate simulations of appropriate seal designs. 

Thermal Analysis 

Differential Scanning Calorimetry (DSC) 

DSC analysis compares the exothermic and endothermic 

reactions of samples and a reference, as the sample and 

reference are heated through a defined heating regime. The 

technique enables the accurate determination of glass transition 

temperatures, crystallization and melting points and in the case 

of elastomers, cure characteristics. This technique is valuable for 

failure analysis and compound development. 

Thermogravimetric Analysis (TGA) 

TGA analysis accurately weighs a sample as it is heated, from 

typically 25°C to 1000°C. As the heating progresses, different 

components of the elastomer formulation ‘burn off’ thereby 

reducing the weight. A step-like pattern emerges which 

correlates quantitatively with the components of the formulation. 

This technique is valuable for compound development, 

reverse-engineering, process control and failure analysis. 

Spectroscopy 

Infra-red Spectroscopy (FTIR) 

FTIR involves passing an infra-red light through or impinging on a sample of material. The light gives up some of its energy, causing 

various molecular structures in the sample to vibrate, twist or stretch; the resultant light is then compared with a reference light 

stream and the result is represented as a characteristic plot of peaks. This technique is helpful in ‘fingerprinting’ materials, failure 

analysis and compound development. 

Explosive Decompression Testing 

Explosive decompression (ED) damage of elastomer seals occurs when seals are 

under high pressure for some time and then rapidly de-pressurised. Gases absorbed 

into the elastomer rapidly expand causing the seal to rupture. PPE’s ED test 

equipment can pressurise seals of various geometries up to 70 MPa (10,000 psi) and 

can decompress over any desired cycle or time, whilst at temperatures of up to 

300°C. Using this equipment, compounds can be developed and tested to overcome 

this condition, with pressure, temperature and pressure release cycles simulating 

actual field operation, the performance of seal types and grades can be confirmed 

before installation. With a 3L cylinder, the ED test rig has been designed to meet Total, 

NACE, NORSOK and Shell test requirements with all temperatures, pressures, gas 

mixtures and depressurisation rates detailed therein. The O-ring carrier insert is 

interchangeable to allow O-rings to be tested at various squeeze levels, in face and 

piston geometries. This equipment also tests high-pressure sealing capability versus 

diametral clearance and back-up ring performance. 

The services of the Material Characterisation Centre are 

available at very competitive rates – see our website 

(www.prepol.com) for more details. 

More information on the types of tests undertaken can be 

found in the ‘Elastomer Terminology’ section of this brochure. 

8

Online seal selection resource for engineers 

www.prepol.com 

A one-stop seal selection resource for engineers. 

Includes useful tools and wizards which are quick, free and easy to use. 

PPE Services 

Chemical Compatibility Lookup Wizard / Material Selector Tool 

If you would rather not spend time looking up numerous chemicals from pages of lists and tables, we have made it much easier by 

transferring all this information onto our website. With just a few clicks to select the appropriate chemicals, the wizard instantly scores 

the various elastomer types against each chemical individually and collectively. The wizard then allows you to shortlist the chemicals 

and finally suggests the most appropriate PPE elastomer grades for the short-listed chemicals, which can be sorted and ranked by 

various criteria including temperature, hardness, colour, compression set, etc. 

Select ‘Technical’ and ‘Material Selector Tool’ from the menu. 

Datasheets, Specifications and Elastomer Guides 

All the technical specifications and datasheets you will ever need are available in our datasheet download library enabling you to 

print-off the latest information for PPE elastomers. 

Select ‘Technical’ and ‘Datasheet Library’ from the menu. 

The document library includes PDF newsletters and technical guides covering: types of elastomer compounds, chemical 

compatibility, food and pharmaceutical seals and seals for diesel engines. 

Select ‘Technical’ and ‘Literature Library’ from the menu. 

9

PPE Services 

Online seal selection resource for engineers 

www.prepol.com 

A one-stop seal selection resource for engineers. 

Includes useful tools and wizards which are quick, free and easy to use. 

O-ring and Groove Dimension Look-up Wizard 

AS and BS dimensions in a flash. 

This easy to use wizard allows you to quickly identify the best fit standard sized O-ring for your equipment and print off a full 

dimensional drawing. No longer do you have to spend hours thumbing through tables and calculating the seal size, the wizard does it 

all within seconds. It provides AS and BS sizes for the most common seals used in plant equipment, specifically, rod seals, piston 

seals, face seals and trapped seals. It also provides a detailed technical drawing of the groove showing all dimensional 

measurements which can be included in other reports and drawings. 

Select ‘Technical’ and ‘Hardware Design Tool’ from the menu. 

Online Helpdesk 

Need help Got a sealing problem Look no further than our experts 

If you have a question relating to any aspect of elastomer seals we’ve probably been asked it before. For a quick answer, 

consult our Frequently Asked Questions (FAQ) page which is constantly updated. If your question doesn’t already appear, 

don’t be afraid to ask our team of experts, and they will respond promptly. 

Select ‘Technical’ and ‘FAQ’ from the menu. 

10

As part of the PPE Group of companies, Perlast Limited 

specialises in the manufacture of the latest generation of 

perfluoroelastomer materials. 

is a third generation perfluoroelastomer developed 

to meet the increasing need for seals with outstanding mechanical 

properties combined with excellent chemical resistance. 

This high performance material combines the chemical and thermal resistance of 

polytetrafluoroethylene (PTFE) with the elastomeric properties of fluorocarbon (FKM). 

is available as AS, BS, metric and custom O-rings, custom mouldings, bonded 

parts and sheets, in a range of hardnesses from 50 to 90 Shore and in a range of colours. 

characteristics: 

• High temperature stability up to 330°C 

• Exceptional chemical resistance 

• Total reliability 

• High purity 

• Assured quality 

• Steam resistant grades 

• Low out-gasing under vacuum 

• Good long-term high temperature 

compression set resistance 

• Low permeability 

• Longevity 

Perfluoroelastomers 

Designated by ASTM as an ‘FFKM’ (a perfluoro rubber of polymethylene type, generically 

known as a perfluoroelastomer) the 

range of elastomers offer performance 

characteristics that span the most demanding of applications in industries as diverse as 

pharmaceutical processing,semiconductor manufacture, large diesel engines for ocean liners 

and power generation plants in remote locations. 

perfluoroelastomer parts are produced in a wide range of grades, many of which 

carry the respective approvals for food, pharmaceutical and semiconductor applications. 

Key 

Industries 

The flexibility of Perlast 

provides a number 

of advantages: 

• Available as AS, BS, metric and 

imperial standard O-rings and 

non-standard sized O-rings, plus 

custom components, composite 

parts and bonded parts. 

• In-house tooling means that 

non-standard O-rings and 

custom components can be 

supplied just as easily as 

standard sizes. 

• An extensive range of material 

grades ensuring the optimum 

material for each application. 

• Rapid production with 

exceptionally short lead-times. 

Semiconductor & Flat Panel Display (FPD) 

Plasma resistant and ultra-pure grades. 

Pharmaceutical & Bio-anaylitical 

FDA and USP Class VI compliant grades. 

Chemical Processing 

Fully fluorinated compounds offer the highest 

level of chemical resistance. 

Food and Dairy 

FDA and FCN compliant materials and metal 

detectable seals. 

Diesel Engines 

High temperature and fluid resistant grades. 

Oil & Gas 

High pressure and high temperature resistant 

materials. 

For more information on Perlast ® , request a copy of the Perlast Brochure or visit www.perlast.com. 

11

Seal selection 

Selecting the correct seal 

The process of selecting a seal must take account of a range of different criteria to ensure that 

the optimal material grade and seal size or design is suitable for the application. 

Key selection criteria broadly fall into three main categories: the service conditions; 

hardware and seal design considerations; and regulatory or approval requirements. 

Service conditions 

• What process media will the seal be exposed to (including 

those used in cleaning or maintenance operations) 

• What temperature will the seal be subjected to (both 

maximum and minimum) – in storage, normal operation 

and extreme conditions (such as equipment overload 

scenarios) 

• Will the seal be exposed to low or high pressure 

Will this be constant or cycling 

• Will the seal be used in a static or dynamic environment 

• If used dynamically, will the movements be reciprocating 

or rotary 

• Are there other constraints such as exposure to 

weathering (eg, UV light, ozone), flame retardancy, 

electrical conductivity 

• What is the seal life expectancy and what are the 

consequences of seal failure 

Design considerations 

• What are the shape and dimensions of the housing 

(or gland) where the seal must fit 

• Will a standard size O-ring be acceptable, or is a 

non-standard size O-ring or a custom design required 

• How will the seal be installed Does it need to be 

self-retained during hardware assembly 

• Are there other constraints which will affect seal 

dimensions and tolerances, such as hardware out of 

flatness 

• What is the surface finish of the hardware 

• Are there any constraints on cost versus reliability 

Approval/Specification requirements 

• What customer specifications are required 

• What regulatory body standards are required 

(e.g. FDA, USP, 3A) 

• Does the seal need to be a specific colour 

The flowchart opposite summarises the main steps involved in a selecting the correct seal. To assist engineers further with the 

selection process, PPE has developed various online tools available at www.prepol.com 

material selector hardware design bespoke design 

12 

Material selector tool – an interactive 

elastomer chemical compatibility guide 

to identify the material grades which 

are compatible with various process 

media. More details on page 9. 

Hardware design wizard – an 

interactive groove/gland dimension 

calculator to select standard BS4518 

and BS1806 O-ring sizes, with a full 

dimensional drawing available to print. 

More details on page 10. 

For the selection of non-standard 

O-rings and gland design or the 

design of custom seals, please consult 

the PPE technical sales team for 

assistance. 

Tel. +44 (0) 1254 295400

Selecting the correct seal 

Identify operating temperature 

range (max. & min.) 

Identify process media 

and environment 

Seal selection 

Identify possible material 

types using PPE’s 

Chemical Compatibility Guide 

Compare operating temperature ranges of each type of material 

with the application requirements to produce a short-list of materials 

Is the 

application static 

or dynamic 

DYNAMIC 

Select material types with 

high Tensile Strength. 

(Avoid materials such 

as VMQ/FVMQ) 

STATIC 

LOW PRESSURE 

Is the 

operating pressure 

high or low 

HIGH PRESSURE 

Select softer 

material grades 

Select harder 

material grades 

Are any 

industry approvals 

required 

(e.g. FDA) 

YES 

Short-list material grades 

comparing specification 

requirements against 

datasheets 

NO 

CUSTOM PART 

Is an 

O-ring or custom 

part required 

O-RING 

Contact PPE to 

discuss requirements 

Identify standard size availability 

(metric/imperial) 

Standard 

(metric) 

Select a BS4518 O-ring 

groove design from PPE’s 

Hardware Design Tool 

Standard 

(imperial) 

Select an AS568 or BS1806 

O-ring groove design from 

PPE’s Hardware Design Tool 

13

Elastomer types and properties 


Elastomer types are often referred to under standard designations/acronyms 

listed in ASTM D1418 or ISO 1629. A brief description of each elastomer type 

and their typical characteristics follows: 

ACM (Polyacrylic or Polyacrylate) 

These rubbers are usually copolymers of ethyl acrylate and a 

vinyl ether and are resistant to heat, hydrocarbon oils and in 

particular, oil additives, especially sulphurised types used for 

lubrication under extreme pressure conditions. 

ACM elastomers offer excellent heat resistance; they can typically 

be used at temperatures of 150°C (up to 175°C for limited 

periods). They provide high resistance to ozone, weathering and 

oxidation but are extremely susceptible to hydrolysis, hence their 

unsuitability for use in aqueous media. Compression set and low 

temperature flexibility depends on the base polymer and 

compounding choice. ACM elastomers are used primarily where 

combined resistance to heat and oil is required, typical uses 

include O-rings, seals and gaskets mainly for the automotive 

industry, particularly under-bonnet applications. 

CR (Chloroprene) 

Chloroprene rubbers are essentially chlorinated polyisoprenes, 

which exhibit medium resistance to high molecular weight oils. 

Chloroprene rubbers contain chlorine in the polymer to reduce 

the reactivity to many oxidising agents, as well as to oil and 

flame. CR elastomers also have good resistance to ozone 

cracking, heat ageing and chemical attack. Some of the 

important applications of CR elastomers include Vee-belts, 

coated fabrics, cable jackets, tyre-sidewalls, seals and gaskets in 

contact with refrigerants, mild chemicals and atmospheric ozone. 

CSM (Chlorosulphonylpolyethylene or 

Chlorosulphonatedpolyethylene) 

CSM grades contain 24-43% chlorine content to provide 

excellent ozone and weather resistance, high resistance to 

many oxidising and corrosive chemicals, good resistance to 

dry heat to 150°C, low flammability and gas permeability, and 

also good resistance to hot water (when cured with lead 

oxide). The low temperature properties are generally limited, 

depending on the chlorine content of the CSM grade used, 

and the compression set is not very good. CSM elastomers 

are generally useful in electrical applications, weather resistant 

membranes, hoses and acid resistant tank linings. 

AEM (Ethylene Acrylic) 

These elastomers are terpolymers of ethylene, methyl acrylate 

and a cure site monomer. AEM elastomers offer good resistance 

to heat ageing, weathering, aliphatic hydrocarbons and good low 

temperature performance. They show poor resistance to strong 

acids, hydrolyzing agents and some polar fluids. 

AEM applications are similar to those of ACM elastomers, but 

AEM has the advantage where low temperature flexibility is 

concerned. Applications typically include shaft seals, spark 

plug boots, CV joint bellows and ignition wire jackets. 

AU / EU (Polyester and Polyether Urethane) 

These elastomers generally show outstanding tensile strength, 

tear and abrasion resistance, and give excellent protection 

against oxygen and ozone (except in hot climates, due to 

greater risk of microbiological attack in AU types, and 

ultraviolet light in the case of EU types). EU elastomers have a 

better low temperature flexibility (-35°C typically) and both 

have excellent resistance to high-energy radiation. 

ECO (Epichlorohydrin) 

These halogenated linear aliphatic polyethers show excellent 

resistance to ozone and weathering and very good resistance 

to hydrocarbon oils bettered only by polysulphides, 

fluoroelastomers and high-acrylonitrile nitrile rubbers. They 

exhibit good mechanical properties but are susceptible to sour 

gas attack. They are unsuitable for use with ketones and 

esters, alcohols, phosphate ester hydraulic fluids, sour gas, 

water and steam, and generally not recommended for rubber 

to metal bonding (they are corrosive to metals). The main 

applications for ECO elastomers are centred on the automotive 

industry, for use as seals, gaskets, diaphragms, cable jackets, 

belting, plus low temperature Natural Gas diaphragms. 

Polyurethane rubbers are used where high abrasion resistance 

and oil / solvent resistance are required together, e.g. hydraulic 

seals and gaskets, diaphragms, hoses and roller-skate and 

skateboard wheels. In all applications, consideration should be 

given to hydrolysis and limited heat resistance. 

14 

A complete list of current PPE material grades 

is available on our website: www.prepol.com


EPR/EPDM (Ethylene-Propylene) 

These rubbers are mainly available in two structures – as the 

copolymer (EPR), or as the terpolymer (EPDM). The properties 

for both types of rubber are very similar with the polymers 

exhibiting outstanding resistance to weathering, ozone, water 

and steam. These rubbers have good chemical resistance and 

are particularly recommended for use with phosphate ester 

based hydraulic systems. They are typically used in the 

production of window and door seals, wire and cable 

insulations, waterproofing sheets and hoses. They are not 

suitable for use with mineral oils or petroleum based fluids. 

These rubbers can either be sulphur or peroxide-cured, in 

general sulphur-cured grades have superior mechanical 

properties and inferior high temperature properties and viceversa 

for peroxide cured grades. 


FEP/PFA (Fluoroethylene Propylene-Perfluoroalkoxy) 

These chemically modified fluorocarbon copolymers 

(fluoropolymers) appear more like plastic than rubber, they are 

extremely resilient and show excellent chemical resistance. 

Mechanical properties are very good even at high 

temperatures. Non-stick characteristics are excellent and 

abrasion resistance can be classified as moderate. The 

effective continuous temperature range is from -100°C to 

+200/250°C for FEP/PFA respectively. Typical applications 

include door seals and sealing systems in diaphragm pumps, 

cryogenic plants, sealed filter units, corrosive fluid plants, relief 

and emergency valves and pneumatics. Fluoropolymers are 

often used to encapsulate other elastomers to produce 

composite seals. 

FEPM or TFE/P (Tetrafluoroethylene/Propylene) 

A copolymer of tetrafluoroethylene and propylene, FEPM is 

solely produced by the Asahi Glass Company, and sold under 

the name Aflas ® . FEPM vulcanisates exhibit similar thermal 

stability to FKM elastomers, but better electrical resistance 

and a different chemical resistance profile. FEPM compounds 

have the ability to resist a wide range of chemical 

combinations such as sour gas and oil, acids and strong 

alkalis, ozone and weather, steam and water, all hydraulic and 

brake fluids, alcohols, amine corrosion inhibitors, water-based 

drilling and completion fluids, high pH completion fluids and 

high energy radiation. However, they are not compatible with 

aromatic hydrocarbons, chlorinated hydrocarbons (e.g. M.E.K. 

and acetone), organic acetates and organic refrigerants. 

FEPM elastomers are suitable for long-term service in air up to 

225°C and for short periods up to 250°C, but are limited in 

low temperature applications. They are finding wide 

applications mainly in oil-field operations and chemical 

processing as O-rings, seals and gaskets, cable insulating and 

jacketing and hose liners. 

FFKM/FFPM (Perfluoroelastomer) 

FFKMs exhibit outstanding high temperature properties and 

are the most chemically resistant elastomer available; 

effectively a rubber form of PTFE. They are superior to FKM 

elastomers, showing continuous dry-heat resistance to 260°C, 

with extended performance to 330°C for high temperature 

grades. They are extremely inert chemically and show 

excellent resistance to the majority of chemicals that attack 

other elastomers. Other notable properties include excellent 

resistance to oil-well sour gases, high temperature steam, low 

out-gassing under vacuum and good long-term high 

temperature compression set resistance. Typical applications 

are sealing systems for oil refineries, pharmaceutical plant, 

aerospace, chemical plant and the semiconductor industry. 

See Page 11 for details of Perlast ® , the FFKM 

Perfluoroelastomer material from PPE. 

FKM/FPM (Fluoroelastomer or Fluorocarbon) 

This class of rubber is available as a copolymer, terpolymer or 

tetrapolymer; the type determines the fluorine content and 

thus, chemical resistance. FKM materials are either bisphenolcured 

or peroxide-cured for better resistance to wet 

environments. General properties include excellent resistance 

to heat, aliphatic and aromatic hydrocarbons, chlorinated 

solvents and petroleum fluids. Fluoroelastomers have a clear 

superiority in O-ring sealing force retention over most other 

oil-heat resistant rubbers with the exception of 

perfluoroelastomers such as Perlast ® (see page 11). 

FKM/FPMs do show poor resistance to ethers, ketones, 

esters, amines and hydraulic fluids based on phosphate 

esters. Special compounds are required to provide suitable 

resistance to hot water, steam and wet chlorine. Typical 

applications are for valve-stem seals, crankshaft seals, diesel 

engine cylinder O-ring seals, pinion seals, glow plug seals, 

ducting expansion joints and seals for the aerospace industry. 


is available on our website: www.prepol.com 

15



Copolymer, Terpolymer or Tetrapolymer 

Fluoroelastomer or fluorocarbon (FKM/FPM) materials are available in three general types depending 

on their fluorine content and the number of monomers contained within the polymer: 

Type 

Copolymer 

(A/E) 

Terpolymer 

(B or F) 

Fluorine 

Content 

65-65.5% 

67% 

Advantages/Disadvantages 

Contains two monomers (simple molecules from which polymers are built). 

General purpose, most common, most widely used for sealing. 

Best compression set and very good fluid resistance. 

Often referred to as 'A' and 'E' type grades. 

These are normally the least cost types of compound. 

Contains three monomers. 

Better fluid and oil/solvent resistance than copolymers but at the expense of 

poorer compression set resistance. 

Often referred to as 'B' or ‘F’ type grades. 

‘F’ grades offer superior fluid resistance over ‘B’ grades. 

Tetrapolymer 

(G) 

67-69% 

Contains four monomers. 

Improved fluid, acid, solvent resistance over other types. Compression set better 

than terpolymers. These are sometimes known as 'G' grades. 

In addition, certain tetrapolymers have good low-temperature flexibility. 

Tetrapolymers are the most costly of the three types listed here. 

Tetrapolymer materials can also be referred to as GF, GLT and GFLT grades 

which correspond to Viton ® FKM materials. 

GF – Good high temperature performance and chemical resistance but reduced 

mechanical properties and low temperature performance. 

GLT – Improved low temperature performance but reduced chemical resistance. 

GFLT – Good all-round low/high temperature performance and chemical resistance. 

Viton ® is a registered trade name of Dupont Performance Elastomers. 

FVMQ (Fluorosilicone) 

FVMQ elastomers are modified silicone rubbers, which have 

many of the properties associated with silicone rubber but 

show great improvements in oil and fuel resistance. Typical 

properties include excellent resistance to ozone, oxygen, 

weathering and non-adhesive characteristics. They have a 

very wide service temperature range and low chemical 

reactivity. They do however have low tensile strength, poor 

tear and abrasion resistance and high gas permeability. Typical 

uses include sealing systems requiring wide temperature 

exposure and resistance to aerospace fuels and oils. 

IIR (Butyl) 

This copolymerised structure of isobutene and isoprene has 

an effective long-term temperature range of -50° to +120°C. 

The key properties for this rubber are very low gas 

permeability and water absorption with very good resistance 

to ozone, weathering and oxygen. All grades have very low 

elastic resilience and are suitable for use with many fluids 

except for mineral and petroleum based chemicals. Typical 

applications are tyre inner tubes, vacuum seals and 

membranes, pharmaceutical enclosures and shock absorbers. 

IR (Polyisoprene) 

Synthetic version of natural rubber; its strengths and uses are 

similar, but its relative purity means that IR materials tend to 

crystallise less at low temperatures. Consequently, it has 

better performance at lower temperatures but, at normal 

temperatures, its performance is inferior to natural rubber. 

NBR (Nitrile or Acrylonitrile Butadine) 

The properties of this copolymer are governed by the ratios of 

the two monomers acrylonitrile and butadiene. Nitrile rubber 

can be classified as three types based on the acrylonitrile 

(ACN) content (low, medium and high). The higher the ACN 

content, the higher will be the resistance to aromatic 

hydrocarbons. The lower the ACN content, the better will be 

the low temperature flexibility. The most commonly specified, 

and the best overall balance for most applications is, 

therefore, 'medium nitrile'. 

High Nitrile: 

Medium Nitrile: 

Low Nitrile: 

>45% ACN content 

30 – 45% ACN content 

< 30% ACN content 

General characteristics of NBRs include excellent resistance to 

aliphatic hydrocarbon oils, fuels and greases, very low gas 

permeability, improved heat ageing and ozone resistance, 

improved tensile and abrasion strength, hardness, density and 

low compression set. Typical applications are as gaskets and 

seals, hoses and cable jacketing in hydraulic/pneumatic 

systems and oil/hydrocarbon based environments. 

16


HNBR (Hydrogenated Nitrile) 

HNBR elastomers are a saturated version of NBR, showing 

superior heat resistance. General properties include excellent 

wear resistance, high tensile strength, high hot-tear resistance, 

low compression set and very good ozone and weathering 

resistance. They also exhibit good resistance to many oil 

additives, hydrogen sulphide, high-energy radiation and amines 

present in crude oil. 

HNBRs fill the gap between NBRs and FKMs in many areas of 

application where resistance to heat and aggressive media are 

required simultaneously, and may therefore provide a lower cost 

alternative to FKM elastomers. Typical applications are in extreme 

environments such as oil-fields and under-bonnet automotive. 

NR (Natural rubber ) 

Natural rubber (tapped from the cultivated rubber tree) exhibits 

high tensile strength, abrasion resistance, resilience, tear 

strength and low hysteresis. These rubbers exhibit the best 

long range elasticity. 

SBR (Styrene-Butadiene) 

This copolymer of styrene and butadiene is used in general 

applications where exposure to mineral oils is not required. 

Originally developed to replace natural rubber, it performs 

better at high temperatures, although tensile strength, 

resilience and abrasion resistance are inferior at lower 

temperatures. SBRs have inferior weathering and chemical 

resistance to most other elastomers. Typical applications are 

sealing requirements for hydraulic braking systems. 

TFE/P (Tetrafluoroethylene/Propylene) 

See FEPM. 

VMQ/PVMQ (Silicone) 

These elastomers, which include the phenyl substituted 

silicones are noted for their high and low temperature 

applications (phenyl silicones offer exceptionally low temperature 

flexibility). They have excellent resistance to ozone and 

weathering and good resistance to compression set at high 

temperatures. They do, however, have poor tensile strength, 

low tear and abrasion resistance and high gas permeability. 

Silicones have a low level of combustible components; even 

when exposed to flame, the elastomer is reduced to a nonconducting 

silica ash. Silicones also exhibit excellent 

compression set and high physiological inertness (tasteless, 

odourless and completely non-toxic). Silicones are also resistant 

to bacteria, fungi, a wide range of media including high energy 

radiation and excellent release properties (except to glass). 

Platinum-cured silicones offer enhanced levels of purity and low 

extractables making them ideal for pharmaceutical, biomedical 

and food & drink applications. 


The chemically similar IR (polyisoprene) has lower strength 

properties than the natural form but better low-temperature 

performance. Both rubbers are susceptible to degradation by 

weathering, and both show poor resistance to mineral and 

petroleum-based oils and fuels. 

Main applications apart from tyres are for vibration mounts, 

springs and bearings. 

PTFE (Polytetrafluoroethylene) 

Polytetrafluoroethylene is not an elastomer but an extremely 

inert thermoplastic, unaffected by virtually all known solvents. 

It also exhibits this inert characteristic over a wide range of 

temperatures. Its hardness and lack of elasticity prevents its 

general use as an elastomeric sealing ring, but it is often used 

as a back-up ring. Typical applications are backing rings, 

bearings and non-stick requirements, or for use in composite 

seals when combined with elastomers. 


is available on our website: www.prepol.com 

17



This graph positions the various elastomer types according to typical temperature and chemical resistance. Elastomers which are in 

the top right-hand corner are considered high performance elastomers. 

Typical temperature capability of elastomers 

This graph shows the typical useful operating temperature range of each elastomer type. 

Normal operating temperature 

short-term operation or special 

high temperature grade required 

short-term operation or special 

low temperature grade required 

18 


is available on our website: www.prepol.com

Elastomers for specific industries and applications 

In some industries, elastomers must meet certain requirements or comply with 

specific regulations and standards. Below is a summary of criteria required in 

various industries:- 

Aerospace/Defence 

Approved to ISO 9001/2000 and AS9100, PPE’s short 

lead-times and production capabilities fit well with the 

requirements of maintenance, repair and overhaul operations. 

Military customers, in particular, take advantage of our efficient 

make-to-order capabilities where limitations on cure dates (shelf 

life) prevent speculative stock holding of spares. A range of 

materials are available which conform to the test requirements 

of the DTD and MIL specs, these materials are used in a wide 

range of aircraft and support systems. 

In addition to the more traditional areas of sealing such as in 

electrical and fuel systems, our materials with extreme 

temperature capabilities such as phenyl silicones and Perlast ® 

perfluoroelastomers are being specified for demanding 

applications such as jet engines, laser infra-red counter 

measures and high pressure gas generators. 

Elastomers typically used in this industry include high FKMs, 

low temperature FKM, ultra-low compression set FKM, low 

temperature fluorosilicones, nitriles (NBR), special EPDMs and 

ultra-high temperature FFKMs. 

long-term resistance to coolants, lubricating oils, corrosion 

inhibitors and fuels - from high grade diesel and unrefined 

gases to aggressive heavy fuel oils (HFO). Our materials have 

a proven track record in the most arduous areas such as the 

cylinder liners, flame deck, fuel delivery and exhaust valve seat 

applications where planned maintenance schedules are met 

and even exceeded. 

For applications calling for the use of SF6 (sulphur hexafluoride) 

insulating gas and oil filled transformers, our specially formulated 

E70V EPDM grade with low electrical conductivity ensures long 

service life in extreme weather conditions. 

Elastomers typically used in this industry include EPDM, NBR, 

HNBR, fluorocarbons (FKM), silicone (VMQ) and 

perfluoroelastomers (FFKM) for ultimate temperature and 

chemical resistance. 

Ask for a copy of our ‘High Performance Elastomer Seals for 

Diesel Engines’ brochure or download it from our website 

www.prepol.com. 

Chemical Processing 

Sealing for the chemical processing industry requires high 

performance materials which offer excellent high temperature 

and aggressive chemical resistance. The diverse range of 

markets within this industry, including petrochemical and 

pharmaceutical, demand outstanding sealing performance, 

reliability and increased service life, which in turn extends 

preventative maintenance cycles of mechanical seals. 


Defence Standard 02-337 (NES 337) defines O-ring seals 

used on UK Ministry of Defence Surface Ships & Submarines 

and their associated systems and equipment. Typical system 

applications include hydraulics, lubrication systems, fuel 

systems and pneumatics. PPE offers a complete range of 

nitrile and fluorocarbon elastomer materials to meet the 

requirements of this specification. 

Nuclear 

Expertise and capabilities in the design and development of 

seals for high containment applications, from material process 

through to transportation and storage. A wide range of 

materials are available that are suitable for use with ionising 

radiation and hazardous materials, including industry-accepted 

EPDM, Nitrile, FKM and Polyurethane grades. 

Marine Diesel, Generator Sets and Power Generation 

PPE is a world-leading supplier of seals for diesel and gas 

engines for both marine propulsion and electricity generation 

(gen sets). Our seal designs and high performance materials 

continue to be specified on 2 and 4 stroke engines from small 

to large capacity, where typical life expectancy of >20,000 

hours is required. PPE materials have been developed for 

From our extensive range of elastomer compounds we can offer 

materials that meet various international approvals and 

conformance requirements, enabling us to provide superior 

sealing solutions for pumps, valves, mechanical seals, pipe 

couplings and reactors which meet the needs of our customers. 

Pharmaceutical & Bio-analytical 

PPE offers a full range of sealing solutions for pharmaceutical and 

bio-analytical industries where both mechanical and chemical 

properties are crucial, and hygienic sealing capability is critical. 

PPE's pharmaceutical material grades include EPDM, Nitrile, 

Silicone, FKM and FFKM, which have been specially 

developed to withstand steam-in-place (SIP) and clean-inplace 

(CIP) procedures within pipework and vessels. In 

addition, many of these materials are compliant with the 

requirements of the Food and Drug Administration (FDA), 

United States Pharmacopeia - Class VI (USP Class VI) and 

3-A Sanitary Standards. 

Request a copy of our ‘Elastomer Seals for the Food and 

Phamaceutical Industries’ brochure or download it from our 

website www.prepol.com. 

19



Semiconductor 

Semiconductor production 

environments represent some 

of the most aggressive 

environments encountered by 

seals. Seals have to be made 

of ultra-pure materials, survive 

extreme temperatures and a 

mixture of fluorinated gases. 

For these reasons, seals for the semiconductor industry are at 

the cutting edge of material technology. 

PPE scientists and technicians have created a range of 

specially developed high performance materials for use in 

critical semiconductor environments. Emphasis is placed on 

providing a comprehensive range of materials, including the 

latest generation of Perlast ® Perfluoroelastomers, which offer 

enhanced performance and improved functionality. 

The relentless drive to improve productivity and increase wafer 

yields has resulted in increased process temperatures, use of 

more aggressive gases and increased plasma density, all of 

which place escalating demands on current sealing technology. 

Perlast ® compounds have been created to withstand 

temperatures up to 330°C in aggressive media such as activated 

fluorine-based chemistries. The result is a new range of materials 

that will help extend maintenance cycles, reduce particle 

generation and lower chamber leakage rates. 

In addition, PPE can also provide FKM copolymers in black, white, 

brown and green, fluorosilicones in blue and translucent, plus the 

innovative Nanofluor ultra pure, nano-filled fluoropolymer. 

Request a copy of our ‘Perfluoroelastomers for Semiconductor 

Applications’ brochure or download it from our website. 

Offshore (Oil & Gas) 

Precision Polymer Engineering has supplied high performance 

O-ring seals and custom mouldings into the oilfield industry for 

over 25 years. Specialist grades of elastomer are specifically 

tailored to meet the challenges of the most inhospitable 

operating environments in the world, encountering explosive 

decompression, sour gas, extreme temperatures and 

aggressive chemicals. 

PPE supplies components into a wide range of applications, 

including safety critical rubber/metal bonded blow-out 

preventor seals, low friction sampling cylinder seals and fully 

moulded O-rings up to 2 metres in diameter for use on pipe 

couplings and large pumps. 

We offer components with high sealing efficiency for systems 

operating in environments with high temperature combined 

with high pressure such as ultra-deep water drilling to 210 

MPa (30,000 PSI) and 260°C. 

Our broad range of compounds allows our material and 

engineering teams to specify the right solution for every sealing 

system. Elastomers typically used in this industry include NBR, 

HBNR, fluoroelastomer (FKM - copolymers, terpolymers & 

tetrapolymers), Kemex, Aflas ® and perfluoroelastomer (FFKM). 

Explosive decompression (ED) resistant grades are available 

from PPE in Aflas ® , FKM and HNBR. In addition, ED testing is 

available in our state-of-the-art material characterisation centre 

– see page 8 for more details. 

Food and Drug Administration (FDA) 

The Food and Drug Administration is the US Federal Agency 

responsible for ensuring that foods are safe, wholesome and 

sanitary; human and veterinary drugs, biological products and 

medical devices are safe and effective; cosmetics are safe; 

and electronic products that emit radiation are safe. 

Although the jurisdiction of the FDA is in theory restricted to 

the United States, FDA regulations are commonly adopted as 

international control standards. 

Through its Codes of Federal Regulations the FDA provides a 

list of materials and chemicals that are approved for contact 

with foodstuffs. CFR 21.177.2600 describes the relevant 

regulations for ‘Rubber articles intended for repeated use’. 

This lists the ingredients and any quantitative limits that may 

be used in a rubber compounds for moulded products 

intended for repeated use in all stages of food manufacture, 

preparation and transportation. 

CFR21.177.2600 also specifies limits on extractable products 

if the elastomer is to be used in contact with aqueous or fatty 

foods. The regulation specifies extraction test limits in water 

and n-hexane. It is important to note that for an elastomer to 

be compliant to these requirements, then this claim must be 

supported with appropriate documentation. 

The FDA does not ‘approve’ products to CFR21.177.2600; it 

is for the manufacturer of the finished rubber product to 

demonstrate compliance. It is also important to note that 

whilst a component may be made from a material that is 

suitable for food contact, this does not mean that the part is 

technically suitable for its intended application. 

PPE offers an extensive range of FDA-compliant material 

grades that is unrivalled in the sealing industry. The range 

includes EPDM, nitrile (NBR), HNBR, silicone, chloroprene, 

fluoroelastomer (FKM) and perfluoroelastomer (FFKM). 

In addition, PPE has developed an exciting new range of metal 

detectable elastomer compounds designed specifically to meet 

the stringent demands of the food processing industry. The 

DETECTASEAL range includes FDA-complaint grades with 

compounds available in blue, white and black. 

DETECTASEAL O-rings have been tested and proven in use 

at leading food manufacturing plants in the UK. 

20 

PPE materials which are suitable for all the above 

industries are listed on our website: www.prepol.com


Food Contact Notification (FCN) 

The Food and Drug Administration Modernisation Act of 1997 

provides a system whereby a manufacturer or supplier of 

food-contact material may submit an FCN to the FDA 

regarding the identity and use of the new food contact 

substance, together with necessary data to demonstrate that 

the substance is safe for its intended use. FCN is a formal 

acceptance of a material by the FDA, so it is fundamentally 

different to self-certification to FDA CFR21.177.2600. 

An FCN application requires a detailed analysis of the 

compound, its constituents, toxicological effects and intended 

uses, and is much more rigorous than the requirements of 

CFR21.177.2600. The complexity and high cost of the FCN 

process means that only a limited range of very high 

performance perfluoroelastomer materials, that are used in 

critical and very demanding applications, have FCN acceptance. 

PPE offers a number of perfluoroelastomer (FFKM) grades 

which are FCN accepted, ranging in hardness. 

USP Class VI 

The United States Pharmacopeia is a US non-government 

organisation that promotes public health by establishing stateof-the-art 

standards to ensure the quality of medicines and 

other health care technologies. 

Whilst this organisation is concerned with the pharmaceutical 

and bio-technology industries, many manufacturers of hygienic 

equipment will be producing multi-purpose designs to be used 

in a range of different industry sectors. 

Standards are published by the United States Pharmacopeia 

in the National Formulary (USP-NF). Compliance to USP Class 

VI is often requested by end users. Testing for compliance 

involves an assessment of the effects of the material, and 

extractables, on tissue. 

PPE offers a range of material grades approved to USP 29, 

NF24, 2006 for the Biological Test for Plastics, 

Class VI including EPDM, Silicone, Fluoroelastomer (FKM) and 

Perfluoroelastomer (FFKM). 

3-A Sanitary Standards Inc. 

Formed by the US food and dairy industry, 3-A Sanitary 

Standards Inc. defines specifications and best practice for the 

design, manufacture, installation and use of hygienic 

equipment. As with FDA, the 3-A Standards are adopted on a 

worldwide basis. 

Standard no. 18-03, ‘3-A Sanitary Standard for multiple-use 

rubber and rubber-like materials used in product contact surfaces 

in dairy equipment’ describes requirements for food quality 

materials that must also be suitable for cleaning and sanitising. 

Potable Water Grade Seals 

In the UK, FDA-compliant materials approved for drinking water 

applications, must also satisfy the requirement of British 

Standard BS2494 (type W) for the Water Research Council in the 

United Kingdom. The testing regime for WRC approval is 

different to FDA testing, in that it requires elastomer products to 

be tested to ensure that they do not promote the propagation of 

bacteria and do not give any taint to potable water. 

KTW (Germany) specifies the requirements of 

elastomers in potable water as set out by the 

German Technical and Scientific Association 

for Gas and Water (DVGW) in the regulation 

“Arbeitsblatt W270”. 

In France, the medical control of the water intended for human 

consumption is controlled by l’Autorite de Controle Sanitaire (ACS). 

Drinking water approvals vary from country to country, although 

it is common for one country to use a material that has been 

approved under the standard of another country. Our technical 

team can advise on which products are suitable for drinking 

water applications against a number of national standards. 

Request a copy of our ‘Elastomers for the Food, Water and 

Dairy Industries’ or download it from our website. 

Explosive Decompression Resistant 

Permeation of a gas into an elastomer under high pressure 

may not result in any long term effect provided the pressure is 

released gradually, allowing the gas to permeate out of the 

elastomer. However, if the pressure is released rapidly, the 

pressurised gas can expand explosively, rupturing the 

elastomer in a catastrophic manner. PPE offers a number of 

materials which have been formulated to be resistant to 

explosive decompression including Aflas ® , FKM and HNBR 

PPE posses one of the most advanced explosive 

decompression testing units in Europe. Capable of testing 

seals of various geometries up to 10,000 psi, under varying 

compression, over any desired cycle/time within a temperature 

range from subzero up to +250°C. With pressure, temperature 

and pressure release cycles simulating actual field operation, 

independent testing can be carried out to confirm the 

performance of seal types and grades before installation (see 

page 8 for more details). 

Gas Specification Materials 

Materials formulated in accordance with British Standard 

BS2494 (type ‘G’) are suitable for gas applications in the 

United Kingdom. The British Gas Specification BGC/PS/LC6 

sets out the physical properties and quality requirements for 

seals and gaskets used in gas applications. 

PPE offers a range of nitrile (NBR) grades which are 

formulated in accordance with this specification. 


To comply with the requirements of the Standard, the elastomer 

materials must comply with FDA CFR21.177.2600 and also be 

resistant to steam sterilisation, milk fat, acid and alkali cleaning 

solutions and chlorine sanitising agents. The PPE elastomers 

meeting Classes I, II and III of the 3-A Standard include 

Fluorocarbon (FKM), Silicone, EPDM and Nitrile, allowing 

manufacturers to select the most appropriate elastomer according 

to temperature, chemical and physical performance criteria. 

NES 337 Materials 

Defence Standard 02-337 (NES 337) defines O-ring seals 

used on UK Ministry of Defence Surface Ships & Submarines 

and their associated systems and equipment. Typical system 

applications include hydraulics, lubrication systems, fuel 

systems and pneumatics. PPE offers a complete range of 

nitrile and fluorocarbon elastomer materials to meet the 

requirements of this specification. 

21

Elasomer trade names 

Elastomer trade names 

ASTM D1418 

Abbreviation 

ACM 

Chemical name 

Polyacrylate (Polyacrylic) 

Trade names 

Europrene-AR ® , Krynac ® , Nipolar ® , Hycar ® , 

Cyanacryl ® , Noxtite-PA ® 

AEM Ethylene Acrylic Vamac ® W 

AQU 

EU 

Polyester Urethane 

Polyether Urethane 

Vibrathane ® , Pellethane ® , Urepan ® , 

Elastothane ® , Adiprene ® , Desmopan ® , 

Vulkollan ® , Estane ® 

PPE 

Prefix 

P 

Q 

CR 

Chloroprene 

Neoprene ® , Skyprene ® , Butclor ® , 

Baypren ® , Denka ® 

C 

CSM 

Chlorosulphonylpolyethylene 

(Chlorosulphonated polyethylene) 

Hypalon ® , Noralon ® 

L 

ECO Epichlorohydrin Hydrin ® , Herclor ® , Gechron ® H 

EPD 

EPDM 

FEP 

PFA 

Ethylene-Propylene Copolymer 

Ethylene-Propylene Terpolymer 

Fluoroethylene Propylene 

Perfluoroalkoxy 

Buna-AP ® , Dutral ® 

Epsyn ® , Nordel ® , Epcar ® , Keltan ® , 

Royalene ® , Polysar-EDM ® 

Teflon FEP ® , Neoflon FEP ® 

Teflon PFA ® , Neoflon PFA ® 

FEPM See TFE/P Aflas ® , Dyneon BRE ® A 

FFKM/FFPM* Perfluoroelastomer Perlast ® , Kalrez ® , Chemraz ® G 

FKM/FPM* Fluoroelastomer Viton ® , Dai-el ® , Fluorel ® , Tecnoflon ® V 

FVMQ Fluorosilicone Silastic LS ® , FSE ® F 

HNBR Hydrogenated Nitrile Therban ® , Tornac ® , Zetpol ® Z 

IIR Butyl Rubber Exxon Butyl ® , Polysar Butyl ® , Esso Butyl ® J 

IR Isoprene Shell Isoprene Rubber ® R 

NBR 

XNBR 

Nitrile Butadine 

Carboxylated Nitrile 

Breon, Butakon ® , Chemigum ® , Hycar ® 

Buna-N ® , Butacril ® , Paracil ® , Perbunan ® , 

Krynac ® , Europrene-N ® , Nipol ® 

NR Natural Rubber Natsyn ® R 

E 

D 

N 

SBR 

Styrene Butadine (Buna-S) 

Cariflex S ® , Plioflex ® , Europrene ® , Pliolite ® , 

Buna Huls ® , Carom ® , Solprene ® 

B 

TFE/P Tetrafluoroethylene/Propylene Aflas ® , Flourel ll ® , Fluoraz ® A 

VMQ 

PVMQ 

Silicone Silastic ® , Siloprene ® , Rhodorsil ® , Silplus ® S 

ASTM D1418 – Standard practice for rubber and rubber lattices – nomenclature 

* ISO 1629 – Rubber and rubber lattices – nomenclature 

Registered trademark holders: 

Perlast ® - Precision Polymer Engineering. Aflas ® - Asahi Glass. Baypren ® , Therban ® , Polysar Butyl ® , Perbunan ® , Krynac ® , Tornac ® , Polysar EPDM ® , Siloprene ® , Vulkollan ® , Urepan ® , Desmopan ® – Bayer. Epcar ® , Estane ® , 

Hydrin ® , Hycar ® – BF Goodrich. Breon ® , Butaclor ® – BP Chemcials. Carom ® – Chemisches Kombinat. Buna Huls ® , Buna AP ® , Buna-N ® – Chemische Werke Huls. Elastothane ® – Compounding Ingredients. Epsyn ® – 

Copolymer Rubber. Dai-el ® , Neoflon FEP ® , Neoflon PFA ® - Daikin Industries. Noralon ® – Denki Kagugi Chemcial. Pellethane ® – DOW Chemical. Silastic ® , Silastic LS ® – DOW Corning. Keltan ® – DSM. Neoprene ® , Hypalon ® , 

Teflon FER ® , Teflon PFA ® , Nordel ® , Vamac ® , Viton ® , Kalrez ® – Dupont Performance Elastomers. Fluorel ® , Fluorel II ® , BRE ® – Dyneon. Cyanacryl ® , Europrene ® , Europrene N ® , Europrene AR ® – Enichem Elastomeri. Esso Butyl ® 

– Esso. Exxon Butyl ® – Exxon Chemical. Solprene ® – Fina Chemicals. Silplus ® , FSE ® – General Electric. Chemigum ® , Natsyn ® , Pliolite ® , Plioflex ® – Goodyear. Chemraz ® , Fluoraz ® – Greene Tweed. Herclor ® – Hercules 

Chemcial. Denka ® - JSR. Dutral ® , Tecnoflon ® – Solvay-Solexis. Noxtite PA ® – Nippon Oil Seal Industry. Butakon ® – Revertex. Rhodorsil ® – Rhone Poulenc. Shell Isoprene Rubber ® , Cariflex ® – Shell International Chemical. 

Skyprene ® – Todo Soda. Royalene ® , Paracil ® , Adiprene ® , Vibrathene ® – Uniroyal Inc. Butacril ® – Was Ugine Kuhlmann. Gechron ® , Nipol ® , Nipolar ® , Zetpol ® – Zeon Chemicals. 

22 

The trade names listed above are correct at the time of printing.

Chemical compatability guide 

This guide is intended to provide assistance in determining the 

suitability of various elastomer types in different chemical 

environments. The ratings are based on volume swell data 

which has been compiled from published literature, laboratory 

Rating System 

Rating 

Description 

Volume 

Change 

tests, actual field experience and informed judgments. 

As laboratory tests do not necessarily predict end-use 

performance, it is the user’s responsibility to ensure 

suitability in application. 

Comments 


1 Excellent 40% Not suitable. 

No data available 

Insufficient information available for rating. 

Volume change (swell) is only an indicator of fluid compatibility and is intended as a typical guideline for comparative purposes. Fluid 

attack of the polymer may affect various physical properties, including tensile strength, hardness and elongation. Elevated 

temperatures can exacerbate chemical attack on elastomers, therefore in some cases it may be necessary to select special 

formulations which offer improved performance. Please contact PPE for technical support and assistance when choosing the right 

elastomer for a specific application. 

Online Interactive Chemical Compatibility Wizard / Material Selector 

The following chemical compatibility table is available as an 

interactive wizard online at www.prepol.com. Simply select 

the appropriate chemicals from the list and the wizard will 

instantly score the various elastomer types against each 

chemical individually and collectively. The wizard then allows a 

shortlisting of the chemicals and finally suggests the most 

appropriate PPE elastomer grades for the short-listed 

chemicals, which can be further sorted and ranked by various 

criteria including temperature, hardness, colour, compression 

set, etc. 

Select ‘Technical’ and ‘Chemical Compatibility’ from the menu. 

NOTE: The information given in this guide is provided in good faith and believed to be accurate and reliable. For actual applications, 

appropriate testing and validation is mandatory. No representation, guarantee of performance or warranties of any kind are made. 

23


1 = Excellent 

2 = Good 

3 = Doubtful 

4 = Do not use 

* = Special formulation 

PERLAST ® 

FEPM 

SBR 

CR 

FEP & PFA 

EPR & EPDM 

ECO 

IIR (Butyl) 

NBR (Nitrile) 

ACM 

AU & EU 

NR (Natural Rubber) 

FKM (Fluorocarbon) 

AEM 

HNBR 


CSM 

VMQ (Silicone) 

PPE Prefix G A B C D E H J N P Q R V W Z F L S 

Chemical or Media Dynamic And Static Applications Static Only 

Acetaldehyde 1 3 3 1 2 4 2 3 4 4 3 4 3 3 4 3 2 

Acetamide 1 2 4 2 1 1 2 2 1 4 4 4 3 4 2 1 2 1 

Acetic acid (dilute) 1 2 2 1 1 1 2 1 2 4 4 2 1 4 2 2 1 1 

Acetic acid (glacial) 1 3 3 4 1 2 4 2 2 4 4 2 2 4 2 4 4 2 

Acetic acid (hot, high pressure) 1 3 4 4 1 3 4 4 4 4 4 4 2 4 3 4 4 3 

Acetic anhydride 1 2 4 2 1 2 4 2 4 4 4 2 4 4 4 4 2 2 

Acetic oxide (Acetic anhydride) 1 2 4 2 1 2 4 2 4 4 4 2 4 4 4 4 2 2 

Acetone 1 4 3 3 1 1 4 1 4 4 4 4 4 4 4 4 3 4 

Acetone cyanohydrin 1 3 2 1 4 1 4 3 4 4 

Acetonitrile (Methyl cyanide) 1 1 1 1 1 2 1 2 1 

Acetophenone 1 4 4 4 1 1 4 2 4 4 4 4 4 4 4 4 4 4 

Acetyl acetone 1 4 4 4 1 1 4 2 4 4 4 4 4 4 4 4 4 4 

Acetyl chloride 1 1 4 4 1 4 4 4 4 4 4 4 1 4 4 2 4 3 

Acetyl salicylic acid (Aspirin) 1 1 1 4 2 

Acetylene (Ethyne) 1 1 2 2 1 1 1 1 1 4 4 2 1 1 1 1 2 2 

Acetylene tetrabromide 1 1 4 2 1 1 4 1 4 4 4 4 1 4 4 2 4 4 

Acrolein (Acrylaldehyde) 1 1 3 2 1 1 4 2 2 4 4 2 1 4 2 4 

Acrylaldehyde 1 1 3 2 1 1 4 2 2 4 4 2 1 4 2 4 

Acrylonitrile (Vinyl cyanide) 1 2 3 3 1 4 4 4 4 4 4 3 3 4 4 4 3 4 

Adipic acid 1 2 1 1 1 2 2 1 1 4 4 1 1 2 1 1 1 1 

Alkane (Dodecyl benzene) 1 4 4 1 4 4 3 4 4 1 2 2 4 

Alkane sulfonic acid 1 1 1 1 3 4 3 3 1 2 

Alkazene (Dibromoethylbenzene) 1 3 4 4 1 4 2 4 4 4 4 4 2 4 2 4 4 

Alkyl aryl sulfonate 1 2 1 4 1 1 1 1 1 2 

Allyl alcohol 1 1 1 2 1 2 2 2 1 4 3 3 2 1 1 1 1 

Allyl bromide 1 4 4 1 4 4 4 2 4 

Allyl chloride 1 4 2 1 2 3 2 4 2 1 4 

Alum 1 1 1 1 1 1 1 1 4 1 1 3 1 1 1 1 

Aluminium acetate 1 1 3 2 1 1 2 1 2 4 4 1 3 4 2 4 4 4 

Aluminium bromide 1 1 1 1 1 1 1 1 1 3 1 1 1 1 1 1 

Aluminium chloride 1 1 1 1 1 1 1 1 1 1 3 1 1 1 1 1 1 2 

Aluminium fluoride 1 1 1 1 1 1 1 1 1 3 2 1 1 1 1 2 

Aluminium hydroxide 1 1 2 1 1 2 1 2 1 2 2 

Aluminium nitrate 1 1 1 1 1 1 1 1 1 4 3 1 1 4 1 1 1 2 

Aluminium phosphate 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 

Aluminium potassium sulfate 1 1 1 1 1 1 1 1 4 4 1 1 3 4 1 1 

Aluminium salts 1 1 1 1 1 1 1 1 1 3 1 1 1 1 1 1 

Aluminium sodium sulfate 1 1 1 1 1 1 1 1 1 1 

Aluminium sulfate 1 1 2 1 1 1 2 1 1 4 4 1 1 4 1 1 1 1 

Amines 1 2 2 2 1 2 2 4 4 4 2 4 4 3 4 4 2 

24 

Aminobenzene (Aniline) 1 1 4 4 1 2 4 2 4 4 4 4 3 4 4 3 4 4 

Aminobutane (Butyl amine) 1 2 3 4 1 3 4 4 3 4 4 4 4 4 4 4 4 3 

Aminosalicylic acid 1 1 

Ammonia , anhydrous 1 2 4 1 1 1 3 1 2 4 4 4 4 4 2 4 4 2 

Ammonia gas, cold 1 1 1 1 1 1 1 1 1 4 3 1 4 4 1 4 1 1

1 = Excellent 

2 = Good 

3 = Doubtful 



PERLAST ® 

FEPM 

SBR 

CR 

FEP & PFA 

EPR & EPDM 

ECO 

IIR (Butyl) 

NBR (Nitrile) 

ACM 

AU & EU 



AEM 

HNBR 


CSM 




Ammonia gas, hot 1 2 4 2 1 2 4 2 4 4 4 4 4 4 4 4 2 1 

Ammonium acetate 1 1 1 2 1 1 1 1 4 1 1 1 

Ammonium bicarbonate 1 1 1 1 1 1 1 

Ammonium bifluoride 1 4 1 2 2 2 

Ammonium bisulfite 1 1 1 1 3 4 3 3 1 2 


Ammonium bromide 1 1 1 1 1 1 1 

Ammonium carbonate 1 1 1 1 1 1 2 1 4 4 4 1 2 4 4 3 1 2 

Ammonium chloride 1 1 1 1 1 1 1 1 1 3 3 2 1 2 1 2 1 3 

Ammonium cupric sulfate 1 1 1 1 1 3 1 1 1 

Ammonium dichromate 1 1 1 1 1 1 3 1 

Ammonium fluoride 1 1 1 2 1 1 1 1 2 1 1 

Ammonium fluosilicate 1 1 

Ammonium hydrogen fluoride 1 4 1 2 2 2 

Ammonium hydroxide, 3 molar 1 1 2 1 1 1 2 1 2 4 4 2 2 1 2 2 1 1 

Ammonium hydroxide, conc. 1 1 3 2 1 1 2 1 4 4 4 3 2 4 4 3 1 1 

Ammonium iodide 1 1 1 1 1 1 1 1 

Ammonium nitrate 1 1 1 1 1 1 2 1 1 4 4 3 2 3 1 3 1 3 

Ammonium nitrite 1 1 1 1 1 1 2 1 1 4 4 1 3 4 1 3 1 2 

Ammonium oxalate 1 1 1 1 3 1 1 3 1 2 

Ammonium perchlorate 1 4 1 1 1 3 4 1 3 3 1 1 2 

Ammonium persulfate 1 1 4 1 1 1 2 1 4 4 4 3 3 4 4 4 1 1 

Ammonium phosphate 1 1 1 1 1 2 1 1 4 4 1 4 4 1 4 1 1 

Ammonium salts 1 1 1 1 1 1 1 1 3 1 3 1 3 1 1 

Ammonium sulfate 1 1 2 1 1 1 2 1 1 4 4 1 4 4 1 4 1 1 

Ammonium sulfide 1 1 2 1 1 1 2 1 3 4 4 3 4 4 3 4 1 1 

Ammonium sulfite 1 1 1 1 1 1 1 1 

Ammonium thiocyanate 1 1 1 1 1 1 1 

Ammonium thiosulfate 1 1 1 1 1 1 1 1 1 1 1 

Amyl acetate 1 3 4 4 1 1 4 1 4 4 4 4 4 4 4 4 4 4 

Amyl alcohol (Pentanol) 1 1 2 2 1 1 1 1 2 4 4 2 2 3 2 1 2 4 

Amyl amine 1 2 1 1 2 2 3 

Amyl borate 1 1 4 2 1 4 4 1 4 1 1 1 

Amyl chloride (Chloropentane) 1 1 4 4 1 4 4 3 4 2 1 2 2 4 4 

Amyl chloronaphthalene 1 2 4 4 1 4 4 4 3 4 4 1 4 4 2 4 4 

Amyl naphthalene 1 2 4 4 1 4 4 4 3 4 4 1 2 4 2 4 4 

Amyl nitrate 1 4 1 1 1 1 2 4 1 1 3 2 1 2 

Amyl phenol 1 4 1 4 4 4 1 4 

Aniline (Aminobenzene) 1 1 4 4 1 2 4 2 4 4 4 4 3 4 4 3 4 4 

Aniline dyes 1 1 2 2 1 2 4 2 4 4 4 3 2 3 4 2 2 3 

Aniline hydrochloride 1 1 3 4 1 3 4 2 3 4 4 3 2 4 2 2 4 3 

Aniline oil 1 2 4 4 1 2 4 2 4 4 4 3 3 4 4 3 4 4 

Aniline sulfate 1 4 1 1 3 4 1 3 1 2 

Animal oils & fats 1 1 4 2 1 2 1 2 1 1 2 4 1 1 1 1 3 2 

Anisole (Methyl phenyl ether) 1 4 4 1 4 4 3 

Anone (Cyclohexanone) 1 3 4 4 1 2 4 2 4 4 4 4 4 4 4 4 4 4 

25


1 = Excellent 

2 = Good 

3 = Doubtful 



PERLAST ® 

FEPM 

SBR 

CR 

FEP & PFA 

EPR & EPDM 

ECO 

IIR (Butyl) 

NBR (Nitrile) 

ACM 

AU & EU 



AEM 

HNBR 


CSM 




Anthraquinone 1 1 1 1 1 2 4 2 1 

Antifreeze 1 1 1 1 1 1 2 1 2 4 4 2 1 1 2 1 1 1 

Antimony pentachloride 1 4 1 4 4 4 4 

Antimony trichloride 1 2 2 1 2 2 1 2 2 2 

Aqua regia 1 3 4 4 1 3 4 4 4 4 4 4 2 4 4 3 4 4 

Argon 1 1 4 4 1 1 1 2 3 1 1 4 1 1 2 2 4 2 

Aromatic fuels 1 2 4 4 1 4 4 2 4 4 4 1 4 2 2 4 4 

Arsenic acid 1 1 1 1 1 1 1 1 2 3 3 2 1 4 1 1 1 1 

Arsenic trichloride 1 4 1 1 3 4 2 4 4 2 4 

Ascorbic acid 1 4 1 1 3 4 1 1 3 1 2 

Askarel 1 1 4 4 1 4 4 2 4 4 4 1 4 2 2 4 4 

Asphalt 1 4 2 1 4 1 4 2 2 2 4 1 1 2 4 4 

ASTM fluid 101 1 4 4 1 4 3 4 3 4 4 4 1 4 4 1 4 4 

ASTM fuel A (aliphatic) 1 3 4 2 1 4 1 4 1 2 1 4 1 1 1 1 2 4 

ASTM fuel B (30% aromatic) 1 4 4 4 1 4 2 4 1 4 2 4 1 3 1 1 4 4 

ASTM fuel C (50% aromatic) 1 4 4 4 1 4 2 4 2 4 4 4 1 4 2 2 4 4 

ASTM fuel D 1 4 4 4 1 4 2 4 1 2 3 1 2 1 4 4 

ASTM oil 1 (high aniline) 1 1 4 1 1 4 1 4 1 1 1 4 1 1 1 1 2 1 

ASTM oil 2 (medium aniline) 1 2 4 3 1 4 1 4 1 1 2 4 1 1 1 1 4 4 

ASTM oil 3 (low aniline) 1 3 4 4 1 4 1 4 1 1 2 4 1 2 1 1 4 3 

ASTM oil 4 (high aniline) 1 2 4 4 1 4 4 2 2 4 4 1 2 2 4 4 

Automatic transmission fluid 1 1 4 2 1 4 4 1 1 2 4 1 1 1 2 3 4 

Barium carbonate 1 1 1 1 1 1 1 1 1 1 1 1 

Barium chlorate 1 4 1 1 3 1 3 3 1 2 

Barium chloride 1 1 1 1 1 1 1 1 1 2 2 1 1 1 1 1 1 1 

Barium cyanide 1 1 1 3 1 

Barium hydrate 1 1 1 1 1 1 1 1 1 4 4 1 1 1 1 1 1 1 

Barium hydroxide 1 1 1 1 1 1 1 1 1 4 4 1 1 3 1 1 1 1 

Barium nitrate 1 1 1 1 1 3 1 2 

Barium salts 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 

Barium sulfate 1 1 1 1 1 1 1 1 1 4 1 1 1 4 1 1 1 1 

Barium sulfide 1 1 2 1 1 1 1 1 1 4 1 1 1 3 1 1 1 1 

Beer 1 1 4 1 1 1 1 2 1 1 1 4 1 1 1 

Benzal chloride 1 1 4 4 1 4 4 3 4 3 4 4 1 4 2 4 4 

Benzaldehyde 2 2 4 4 1 1 4 1 4 4 4 4 4 4 4 4 4 4 

Benzene (Benzol) 1 3 4 4 1 4 4 4 4 4 4 4 1 4 4 1 4 4 

Benzene sulfonic acid, 10% 2 4 2 1 4 4 4 4 4 4 4 1 4 4 2 1 4 

Benzine (Ligroin) (Nitrobenzine) 1 2 4 2 1 4 1 4 1 1 2 4 1 4 1 1 3 4 

Benzochloride 1 1 4 4 1 1 2 4 4 4 1 1 4 

Benzoic acid 1 1 4 4 1 4 2 4 4 4 4 4 1 4 4 2 4 4 

26 

Benzophenone 1 1 4 4 1 2 4 2 4 4 4 4 1 4 4 1 4 2 

Benzoyl chloride 1 1 4 4 1 4 4 4 4 3 4 4 1 4 4 2 4 4 

Benzoyl peroxide 1 1 1 

Benzyl acetate 1 4 1 2 4 4 4 

Benzyl alcohol 1 1 4 2 1 2 4 2 4 4 4 4 1 4 4 2 2 1

1 = Excellent 

2 = Good 

3 = Doubtful 



PERLAST ® 

FEPM 

SBR 

CR 

FEP & PFA 

EPR & EPDM 

ECO 

IIR (Butyl) 

NBR (Nitrile) 

ACM 

AU & EU 



AEM 

HNBR 


CSM 




Benzyl benzoate 1 2 4 4 1 2 4 2 4 4 4 4 1 4 4 1 4 4 

Benzyl chloride (Chlorotoluene) 1 1 4 4 1 4 4 4 4 4 4 4 1 4 4 2 4 4 

Benzyl dichloride 1 1 4 4 1 4 4 3 4 3 4 4 1 4 4 2 4 4 

Beryllium chloride 1 3 3 1 1 1 3 1 3 1 1 3 3 

Beryllium sulfate 1 4 1 1 1 3 4 1 3 3 1 1 2 


Biphenyl (Phenylbenzene) 1 2 4 4 1 4 4 4 4 4 4 4 1 4 4 2 4 4 

Bismuth carbonate 1 1 1 1 1 1 1 

Black sulfate liquors (cold) 1 1 2 2 1 2 2 2 4 4 2 1 2 2 2 

Blast furnace gas 1 1 4 4 1 4 4 4 4 4 4 1 4 2 4 1 

Bleach liquor 1 1 4 3 1 1 2 1 3 4 4 4 1 3 2 2 1 2 

Borax (Sodium borate) 1 1 2 4 1 1 1 1 2 3 3 2 1 1 1 2 4 2 

Bordeaux mixture 1 1 2 2 1 1 1 2 4 4 2 1 2 1 1 

Boric acid (Boracic acid) 1 1 1 1 1 1 1 1 1 4 3 1 1 2 1 1 1 1 

Boron fluids (HEF) 1 1 4 4 1 4 1 4 2 4 4 4 1 2 4 4 

Boron trichloride 1 1 

Brake fluid (glycol base) 1 1 1 2 1 1 4 2 3 4 4 4 4 4 3 4 2 3 

Brake fluid (mineral oil base) 1 1 4 2 1 4 1 4 1 1 1 4 1 1 1 1 2 3 

Brake fluid (silicone oil base) 1 1 1 2 1 1 4 2 3 4 4 4 4 3 4 2 3 

Brine (Salt water) 1 1 1 2 1 2 2 1 1 4 3 4 1 1 1 1 1 1 

Bromide 1 4 4 1 4 4 1 4 

Bromine 1 1 4 4 1 4 4 4 4 4 4 4 1 4 4 2 4 4 

Bromine pentafluoride 2 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 

Bromine trifluoride 2 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 

Bromobenzene 1 4 4 4 1 4 4 4 4 4 4 4 1 4 4 2 4 4 

Bromochloro trifluoroethane 1 1 4 4 1 4 4 4 4 4 4 1 4 2 4 4 

Bromochloromethane 1 1 4 4 1 2 2 4 4 2 4 4 

Bromoethane (Ethyl bromide) 1 1 3 4 1 4 2 4 2 4 3 4 1 4 2 1 4 4 

Bromotoluene 1 4 1 4 4 4 2 4 

Bromotrifluoromethane 2 1 1 1 1 1 1 1 1 2 1 1 1 2 1 2 1 4 

Bunker oil 1 1 4 4 1 4 4 1 1 2 4 1 1 1 1 4 2 

Butadiene 1 4 4 1 4 4 4 4 4 4 4 1 4 4 1 4 4 

Butane (Butyl hydride) (LPG) 1 3 3 2 1 4 1 4 1 1 4 4 1 3 1 1 2 4 

Butanediol 1 1 2 1 1 1 4 2 1 2 

Butanol (Butyl alcohol) 1 1 1 1 1 2 4 2 2 4 4 1 1 1 1 1 1 3 

Butene (Butylene) 1 4 3 1 4 1 4 2 4 4 4 1 4 2 2 4 4 

Butoxyethanol (Butyl cellosolve) 1 3 4 3 1 2 3 2 3 4 4 4 4 4 4 4 4 4 

Butter 1 1 4 2 1 2 1 2 1 1 2 4 1 1 1 1 3 2 

Butydigol (Butyl carbitol) 1 2 4 3 1 1 1 1 4 4 4 2 4 4 4 4 

Butyl acetate 1 4 4 4 1 2 4 2 4 4 4 4 4 4 4 4 4 4 

Butyl acetyl ricinoleate 1 1 4 2 1 1 1 2 1 4 4 1 2 2 2 

Butyl acrylate 1 4 4 4 1 4 4 4 4 4 4 4 4 4 4 4 4 1 

Butyl alcohol (Butanol) 1 1 1 1 1 2 4 2 2 4 4 1 1 1 1 1 1 3 

Butyl amine (Aminobutane) 1 2 3 4 1 3 4 4 3 4 4 4 4 4 4 4 4 3 

Butyl benzoate 1 4 4 1 1 4 1 4 4 4 4 1 4 4 1 4 4 

Butyl bromide 1 4 1 4 4 4 2 4 

27


1 = Excellent 

2 = Good 

3 = Doubtful 



PERLAST ® 

FEPM 

SBR 

CR 

FEP & PFA 

EPR & EPDM 

ECO 

IIR (Butyl) 

NBR (Nitrile) 

ACM 

AU & EU 



AEM 

HNBR 


CSM 




Butyl butyrate 1 4 4 1 1 2 4 4 4 1 1 4 

Butyl carbitol 1 2 4 3 1 1 1 1 4 4 4 2 4 4 4 4 4 

Butyl cellosolve (Butoxyethanol) 1 3 4 3 1 2 3 2 3 4 4 4 4 4 4 4 4 4 

Butyl chloride (Chlorobutane) 1 4 1 3 3 4 2 3 1 4 2 

Butyl ether 1 4 4 1 3 4 3 3 4 2 4 4 4 3 4 4 

Butyl hydride (Butane) 1 3 3 2 1 4 1 4 1 1 4 4 1 3 1 1 2 4 

Butyl oleate 1 1 4 4 1 2 4 2 4 4 4 4 1 4 4 2 4 3 

Butyl phenol 1 4 4 1 4 4 4 3 4 4 1 4 4 

Butyl phthalate (Dibutyl phthalate) 1 4 4 1 1 4 4 3 4 

Butyl stearate 1 1 4 4 1 4 2 4 2 4 4 4 1 1 2 2 4 3 

Butylene (Butene) 1 4 3 1 4 1 4 2 4 4 4 1 4 2 2 4 4 

Butyraldehyde 2 3 4 4 1 2 4 2 4 4 4 4 4 4 4 4 4 4 

Butyric acid 1 2 4 4 1 2 4 2 4 4 4 4 2 4 4 4 4 4 

Butyric anhydride 1 4 1 3 3 3 2 

Butyrone (Dipropyl ketone) 1 4 1 2 4 4 4 4 

Cadmium chloride 1 4 1 1 1 1 3 4 1 1 3 3 1 1 2 

Cadmium nitrate 1 4 1 1 3 1 1 3 1 1 2 

Cadmium sulfate 1 4 1 1 1 3 4 1 3 1 1 2 

Calcine liquors 1 1 1 1 1 1 4 4 1 1 1 

Calcium acetate 1 1 3 2 1 2 3 1 3 4 4 1 4 4 2 4 4 4 

Calcium bisulfate 1 2 1 2 1 1 

Calcium bisulfide 1 4 1 1 1 3 4 1 3 1 1 2 

Calcium bisulfite 1 1 4 1 1 4 4 4 1 4 3 4 1 4 1 2 1 3 

Calcium bromide 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 

Calcium carbonate 1 1 1 1 1 1 1 1 3 3 1 1 1 1 1 1 1 

Calcium chlorate 1 1 1 1 1 1 1 1 

Calcium chloride 1 1 1 1 1 1 1 1 1 3 3 1 1 1 1 1 1 1 

Calcium cyanide 1 1 1 1 1 1 2 1 1 4 4 1 1 2 1 1 1 1 

Calcium hydrosulfide 1 1 1 1 1 1 1 1 

Calcium hydroxide 1 1 1 1 1 1 1 1 1 4 4 1 1 3 1 1 1 3 

Calcium hypochloride 1 1 4 4 1 1 2 1 4 4 4 4 1 4 1 1 3 

Calcium hypochlorite 1 1 3 3 1 1 2 1 3 4 4 3 1 4 2 2 1 2 

Calcium nitrate 1 1 1 1 1 1 1 1 1 3 3 1 1 2 1 1 1 2 

Calcium oxichloride 1 1 4 3 1 2 2 2 2 4 4 2 1 2 2 2 2 

Calcium oxide 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 

Calcium permanganate 1 1 1 1 

Calcium phosphate 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 

Calcium salts 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 

Calcium silicate 1 1 1 1 1 1 1 1 1 1 1 1 

Calcium sulfate (Gypsum) 1 1 1 1 1 1 1 1 1 1 1 1 

28 

Calcium sulfhydrate 1 1 1 1 1 1 1 1 1 

Calcium sulfide 1 1 2 1 1 1 2 1 2 4 1 2 1 4 1 1 1 2 

Calcium sulfite 1 1 2 1 1 1 1 1 4 1 2 1 1 1 1 1 

Calcium thiosulfate 1 1 2 1 1 1 2 1 2 4 3 2 1 2 2 1 1 1 

Caliche liquors 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2

1 = Excellent 

2 = Good 

3 = Doubtful 



PERLAST ® 

FEPM 

SBR 

CR 

FEP & PFA 

EPR & EPDM 

ECO 

IIR (Butyl) 

NBR (Nitrile) 

ACM 

AU & EU 



AEM 

HNBR 


CSM 




Camphor 1 4 2 1 4 4 1 4 2 4 

Cane sugar liquor 1 1 1 1 1 1 1 1 2 4 4 1 1 1 2 1 1 1 

Capric acid (Caproic acid) 1 2 2 2 1 4 1 1 4 1 1 1 2 2 

Caproic aldehyde 1 4 1 1 2 2 4 4 4 2 4 4 2 

Capryl alcohol (Octanol) 1 1 2 2 1 1 2 2 2 4 4 2 1 2 2 2 2 2 


Carbamate 1 4 2 1 2 2 3 4 4 4 1 4 1 2 

Carbinol (Methanol) 1 1 1 1 1 1 2 1 2 4 4 1 1 1 1 2 1 2 

Carbitol 1 2 2 2 1 2 2 2 4 4 2 2 4 2 2 2 

Carbolic acid (Phenol) 1 1 4 4 1 2 4 2 4 4 4 4 1 4 4 1 4 4 

Carbon bisulfide 1 1 4 4 1 4 4 4 4 3 4 4 1 4 2 1 4 3 

Carbon dioxide, dry 1 1 2 2 1 2 1 2 1 2 1 2 2 1 1 2 2 2 

Carbon dioxide, wet 1 1 2 2 1 2 1 2 1 2 2 2 1 1 2 2 2 

Carbon disulfide 1 1 4 4 1 4 4 4 4 3 4 4 1 4 3 1 4 3 

Carbon monoxide 1 1 3 3 1 2 1 2 1 1 1 2 1 1 1 2 2 1 

Carbon tetrachloride 2 4 4 4 1 4 2 3 2 4 4 4 1 4 2 2 4 4 

Carbonic acid 1 1 2 1 1 1 1 1 2 3 3 1 1 1 2 1 1 1 

Castor oil 1 1 2 1 1 2 1 2 1 1 1 2 1 2 1 1 1 1 

Caustic potash 1 2 2 2 1 1 2 1 2 4 2 2 2 4 2 2 3 

Caustic soda 1 1 2 2 1 1 2 1 2 4 2 2 2 2 2 3 

Cellosolve 1 1 4 4 1 2 4 2 4 4 4 4 4 4 4 4 4 4 

Cellosolve, acetate 1 3 4 4 1 2 4 2 4 4 4 4 4 4 4 4 4 4 

Cellosolve, butyl 1 2 4 3 1 2 4 2 4 4 4 4 4 4 4 4 4 4 

Cellosolve, methyl 1 2 4 3 1 2 4 2 4 4 4 4 4 4 4 4 4 4 

Cellulose acetate (CA) 1 3 4 1 2 4 4 4 4 

Cetane (Hexadecane) 1 1 4 2 1 4 4 1 1 4 4 1 1 3 2 4 

Cetyl alcohol 1 1 1 4 1 1 1 2 2 

China Wood oil (Tung oil) 1 1 4 2 1 4 3 1 1 3 4 1 2 1 2 3 4 

Chloral hydrate 2 3 3 1 3 3 4 4 3 2 

Chloramine-T 1 1 1 1 1 1 1 1 1 1 

Chlordane 1 1 4 3 1 4 4 2 4 1 2 2 3 4 

Chlorextol 1 1 4 2 1 4 4 2 2 4 4 1 2 2 4 4 

Chloric acid 1 4 4 1 1 2 4 4 1 1 

Chlorinated brine 1 1 4 4 1 4 4 4 4 4 2 1 4 1 2 4 

Chlorinated lime 1 1 4 3 1 2 2 2 2 4 4 2 1 2 2 2 2 

Chlorinated solvents 1 4 4 4 1 4 4 4 4 4 4 1 4 1 4 4 

Chlorine dioxide 1 3 4 4 1 3 4 3 4 4 4 4 2 4 4 2 3 3 

Chlorine trifluoride 2 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 

Chlorine, dry 1 3 4 4 1 4 2 4 4 4 4 4 1 4 3 1 4 4 

Chlorine, wet 1 3 4 3 1 4 3 4 4 4 4 4 1 4 3 2 3 3 

Chloroacetic acid 1 2 4 4 1 2 4 2 4 4 4 4 4 4 4 4 4 3 

Chloroacetone 1 4 4 4 1 1 4 2 4 4 4 4 4 4 4 4 4 4 

Chlorobenzene 1 2 4 4 1 4 4 4 4 4 4 4 1 4 4 2 4 4 

Chlorobromomethane 1 3 4 4 1 2 4 2 4 4 4 4 1 4 4 2 4 4 

Chlorobutadiene (Chloroprene) 1 2 4 4 1 4 4 4 4 4 4 4 1 4 4 2 4 4 

Chlorobutane (Butyl chloride) 1 4 1 3 4 4 2 4 

29


1 = Excellent 

2 = Good 

3 = Doubtful 



PERLAST ® 

FEPM 

SBR 

CR 

FEP & PFA 

EPR & EPDM 

ECO 

IIR (Butyl) 

NBR (Nitrile) 

ACM 

AU & EU 



AEM 

HNBR 


CSM 




Chlorodifluoromethane 1 1 2 1 1 1 1 1 4 2 4 2 4 4 4 1 4 

Chlorodiphenyl 4 4 4 4 1 4 

Chlorododecane 1 2 4 4 1 4 4 4 4 4 4 1 4 1 4 4 

Chloroethylene (Vinyl chloride) 1 2 4 4 1 3 4 3 4 4 4 4 1 4 4 2 4 4 

Chloroform 1 4 4 4 1 4 4 4 4 4 4 4 1 4 4 2 4 4 

Chloronaphthalene 1 4 4 4 1 4 4 4 4 1 2 4 4 

Chloronitroethane 4 4 4 4 4 4 3 4 

Chloropentafluoroethane 1 1 1 1 1 1 1 1 1 2 1 2 1 1 3 1 3 

Chloropentane (Amyl chloride) 1 4 4 1 4 4 4 4 4 2 2 4 4 

Chloroprene (Chlorobutadiene) 1 2 4 4 1 4 4 4 4 4 4 4 1 4 4 2 4 4 

Chlorosulfonic acid 1 1 4 4 1 4 4 4 4 4 4 4 4 4 4 4 4 4 

Chlorothene (Trichloroethane) 1 2 4 4 1 4 4 4 4 4 4 4 1 4 4 2 4 4 

Chlorotoluene (Benzyl chloride) 1 1 4 4 1 4 4 4 4 4 4 4 1 4 4 2 4 4 

Chlorotrifluoroethylene (CTFE) 2 1 4 

Chlorotrifluoromethane 2 1 2 1 1 1 1 1 1 2 4 2 3 1 1 3 1 4 

Chlorox 1 1 4 2 1 2 1 2 2 3 3 3 1 3 2 1 2 2 

Chrome plating solution 1 1 4 4 1 2 2 4 4 4 4 1 4 4 2 4 2 

Chromic acid, 50% 1 1 4 4 1 2 3 3 4 4 4 4 1 4 4 3 2 3 

Chromic oxide (aqueous) 1 1 4 4 1 2 2 4 4 4 4 1 4 2 1 2 

Chromium sulfate 1 2 1 2 2 1 2 

Citric acid 1 1 1 1 1 1 1 1 1 3 3 1 1 1 1 1 1 1 

Cobalt chloride 1 1 1 1 1 1 2 1 1 3 3 1 1 2 1 1 1 2 

Coconut oil 1 1 4 3 1 3 1 3 1 1 3 4 1 1 1 1 3 1 

Cod liver oil 1 1 4 2 1 1 1 1 1 1 1 4 1 3 1 1 2 2 

Coffee 1 1 1 1 1 1 4 1 2 4 4 3 1 3 2 1 1 1 

Coke oven gas 1 1 4 4 1 4 4 4 4 4 4 1 4 2 4 2 

Coliche liquors 1 2 1 1 2 2 2 1 

Coolanol 1 1 4 1 1 4 4 1 4 4 4 1 1 2 2 4 

Copper acetate 1 4 4 2 1 1 3 1 2 4 4 1 4 4 2 4 4 4 

Copper carbonate 1 1 1 1 1 2 4 1 3 1 1 1 1 2 

Copper chloride 1 1 1 2 1 1 2 1 1 3 3 3 1 2 1 1 2 1 

Copper cyanide 1 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 

Copper salts 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 

Copper sulfate, 10% 1 1 2 1 1 1 2 2 1 4 3 3 1 2 1 1 1 1 

Copper sulfate, 50% 1 1 2 1 1 1 2 1 4 3 2 1 4 1 1 1 1 

Copper sulfide 1 1 1 1 1 3 1 1 

Corn oil 1 1 4 3 1 3 1 3 1 1 1 4 1 1 1 1 3 1 

Cottonseed oil 1 1 4 3 1 3 1 3 1 1 1 4 1 1 1 1 3 1 

Creosote (coal tar) 1 1 4 2 1 4 4 4 1 1 3 4 1 3 1 1 4 4 

Creosote (wood tar) 1 1 4 2 1 4 4 4 1 1 3 4 1 4 2 1 4 4 

30 

Cresol (Cresylic acid) 1 1 4 4 1 4 4 4 4 4 4 4 1 4 2 2 4 4 

Crotonaldehyde 1 4 1 1 2 1 2 4 2 2 

Crotonic acid 1 4 2 1 2 2 4 4 4 4 3 4 4 4 4 

Crude oil 1 1 4 4 1 4 1 4 2 1 4 1 1 1 2 4 4 

Cumene (Isopropyl benzene) 1 3 4 4 1 4 4 4 4 4 4 4 1 4 4 2 4 4

1 = Excellent 

2 = Good 

3 = Doubtful 



PERLAST ® 

FEPM 

SBR 

CR 

FEP & PFA 

EPR & EPDM 

ECO 

IIR (Butyl) 

NBR (Nitrile) 

ACM 

AU & EU 



AEM 

HNBR 


CSM 




Cupric chloride (Copper chloride) 1 1 1 2 1 1 2 1 1 3 3 3 1 2 1 1 2 1 

Cutting oil 1 1 4 2 1 4 4 1 1 1 4 1 1 1 1 2 4 

Cyclohexane 1 2 4 3 1 4 1 4 1 2 1 4 1 2 1 1 4 4 

Cyclohexanol 1 1 4 2 1 4 4 4 2 4 4 4 1 3 2 1 3 4 

Cyclohexanone 1 3 4 4 1 2 4 2 4 4 4 4 4 4 4 4 4 4 


Cyclopentane 1 4 1 1 4 4 4 4 4 1 4 

Cymene (Isopropyltoluene) 1 4 4 1 4 4 4 4 4 4 4 1 4 4 2 4 4 

Decahydronaphthalene 1 4 4 1 4 4 3 4 4 4 4 1 4 4 2 4 4 

Decalin 1 4 4 1 4 4 3 4 4 4 4 1 4 4 2 4 4 

Decanal 1 4 1 4 1 4 4 4 4 

Decane 1 1 4 3 1 4 1 4 1 1 2 4 1 3 1 1 3 2 

Decanol (Decyl alcohol) 1 1 4 1 1 1 1 2 1 

Denatured alcohol 1 1 1 1 1 1 1 1 2 4 4 1 1 2 2 1 1 1 

Detergent solution 1 1 2 2 1 1 2 1 1 4 4 2 1 3 1 1 2 1 

Developing fluid (photographic) 1 1 2 1 1 2 2 1 1 1 1 1 1 1 

Dextron 1 1 4 2 1 4 4 1 1 2 4 1 1 1 2 4 4 

Dextrose 1 1 1 1 1 1 1 1 1 4 4 1 1 1 1 1 1 1 

Diacetone (Diacetone alcohol) 1 4 4 4 1 1 4 1 4 4 4 4 4 4 4 4 4 4 

Diazinon 1 4 3 1 4 4 3 4 2 2 3 4 

Dibenzyl ether 1 3 4 4 1 2 4 2 4 4 3 4 4 4 4 2 4 2 

Dibenzyl sebacate 1 2 4 4 1 2 2 4 4 2 4 2 4 4 3 4 3 

Dibromoethyl benzene 1 3 4 4 1 4 2 4 4 4 4 4 2 4 4 2 4 4 

Dibutyl amine 1 2 4 3 1 4 4 4 4 4 4 4 4 4 4 4 4 3 

Dibutyl ether 1 4 4 4 1 3 4 3 4 3 2 4 3 4 4 3 4 4 

Dibutyl phthalate (DBP) 1 2 4 4 1 2 2 3 4 4 3 4 3 4 4 3 4 2 

Dibutyl sebecate (DBS) 1 2 4 4 1 2 3 2 4 4 4 4 2 4 4 2 4 2 

Dichloro isopropyl ether 1 3 4 4 1 3 4 4 3 2 4 3 3 4 3 4 4 

Dichloroacetic acid 1* 4 4 1 1 3 4 4 2 4 4 

Dichlorobenzene 1 4 4 1 4 4 4 4 4 4 4 1 4 4 2 4 4 

Dichlorobutane 1 1 4 4 1 4 4 2 4 4 4 1 2 2 4 4 

Dichlorodifluoromethane 1 2 1 1 1 2 1 2 1 1 2 2 2 1 1 2 1 4 

Dichloroethyl ether 1 4 1 4 4 4 4 4 

Dichloroethylene 1 4 4 1 4 4 4 4 2 3 4 

Dichlorofluoromethane 2 4 2 1 4 2 4 4 4 4 4 4 4 4 4 4 4 

Dichlorotetrafluoroethane 2 1 1 1 1 1 1 1 1 1 1 2 1 1 2 1 4 

Dicyclohexylamine 1 3 4 4 1 4 4 4 3 4 4 4 4 4 3 4 4 4 

Diesel oil 1 1 4 3 1 4 1 4 1 1 3 4 1 2 1 1 4 4 

Diester synthetic lubricant 1 1 4 4 1 4 4 2 2 4 4 1 2 2 4 4 

Diethanol amine (DEA) 1 2 1 1 1 1 2 4 1 2 3 2 1 2 2 

Diethyl amine 1 3 3 1 3 4 3 3 4 3 3 4 4 3 4 3 3 

Diethyl benzene 1 4 4 1 4 4 4 4 4 1 2 4 4 

Diethyl carbonate 1 4 1 4 

Diethyl ether 1 4 4 3 1 3 3 4 3 3 3 4 3 4 3 3 4 4 

Diethyl phthalate (DEP) 1 4 4 1 1 4 4 3 4 

Diethyl sebacate 1 2 4 4 1 3 2 3 4 4 4 2 4 3 2 4 2 

31


1 = Excellent 

2 = Good 

3 = Doubtful 



PERLAST ® 

FEPM 

SBR 

CR 

FEP & PFA 

EPR & EPDM 

ECO 

IIR (Butyl) 

NBR (Nitrile) 

ACM 

AU & EU 



AEM 

HNBR 


CSM 




Diethylene ether (Dioxane) 1 4 4 4 1 2 4 2 4 4 4 4 4 4 3 4 4 4 

Diethylene glycol (Digol) 1 1 3 1 1 1 2 1 1 4 4 2 1 2 1 1 1 2 

Diethylene triamine 1 1 2 

Difluorodibromomethane 1 4 4 1 2 2 4 4 4 4 4 4 4 

Diisobutyl ketone 1 4 4 1 2 4 2 4 4 4 4 4 4 4 4 4 4 

Diisobutylene 1 4 4 1 4 2 4 2 4 4 4 1 4 3 3 4 4 

Diisodecyl adipate (DIDA) 1 4 1 1 4 4 3 4 

Diisodecyl phthalate (DIDP) 1 4 4 1 1 1 4 4 3 4 

Diisooctyl adipate (DIOA) 1 4 1 1 4 4 3 4 

Diisooctyl phthalate (DIOP) 1 4 1 1 4 4 3 4 

Diisooctyl sebecate (DIOS) 1 4 4 1 3 4 3 4 4 4 2 4 3 4 3 

Diisopropyl amine 2 1 1 2 2 3 

Diisopropyl benzene 1 4 4 1 4 4 4 4 4 4 4 1 4 4 2 4 3 

Diisopropyl ketone 1 4 4 1 2 4 2 4 4 4 4 4 4 4 4 4 4 

Dimethyl amine (DMA) 1 4 4 1 4 4 4 4 4 4 4 4 4 4 4 4 4 

Dimethyl aniline 1 4 4 1 3 4 3 3 4 4 4 4 4 4 4 4 4 

Dimethyl ether 1 4 4 3 1 3 4 3 2 4 4 4 2 4 1 4 1 

Dimethyl formamide (DMF) 1 1 4 4 1 3 4 3 2 4 4 4 4 4 2 4 4 2 

Dimethyl ketone (Acetone) 1 4 3 3 1 1 4 1 4 4 4 4 4 4 4 4 3 4 

Dimethyl phthalate 1 2 4 4 1 2 4 2 4 4 4 4 2 4 4 2 4 1 

Dimethyl sulfate 4 1 3 4 4 2 4 

Dimethyl sulfide 1 4 1 4 3 1 4 4 1 1 4 2 

Dinitrotoluene (DNT) 1 4 4 4 1 4 4 4 4 4 4 3 4 4 4 4 4 

Dioctyl phthalate (DOP) 1 2 4 4 1 2 3 2 3 4 3 4 2 3 3 2 4 3 

Dioctyl sebacate 1 1 4 4 1 2 3 2 4 4 2 4 2 4 4 3 4 3 

Dioxane 1 4 4 4 1 2 4 2 4 4 4 4 4 4 3 4 4 4 

Dioxolane 1 4 4 4 1 2 4 3 4 4 4 4 4 4 4 4 4 4 

Dipentene (Limonene) 1 3 4 4 1 4 4 4 2 4 4 4 1 4 2 3 4 4 

Diphenyl (Phenylbenzene) 1 2 4 4 1 4 4 4 4 4 4 4 1 4 4 2 4 4 

Diphenyl oxide (Phenyl ether) 1 2 4 4 1 4 4 4 4 4 4 4 1 3 4 2 4 3 

Dipropyl ketone (Butyrone) 1 4 1 2 4 4 4 4 

Dipropylamine 1 2 1 1 2 2 3 

Dipropylene glycol 1 1 1 1 1 1 1 1 1 

Divinyl benzene (DVB) 1 3 4 4 1 4 4 4 4 4 3 4 2 3 3 4 4 

Dodecyl benzene (Alkane) 1 4 1 4 4 4 1 4 

Drinking water 1 1 2 1 1 1 2 1 1 4 4 1 1 1 1 1 1 

Dry cleaning fluids 2 3 4 4 1 4 4 4 3 4 4 4 1 4 3 2 4 4 

DTE light oil 1 1 4 2 1 4 4 1 1 2 4 1 2 1 1 4 4 

Epichlorohydrin 2 4 4 4 1 2 4 2 4 4 4 4 4 4 4 4 4 4 

Epoxy resin 1 2 1 1 1 1 1 3 4 3 

32 

Epsom salts 1 1 2 2 1 1 2 1 1 4 4 2 1 2 1 1 1 1 

Ethanal (Acetaldehyde) 1 3 3 1 2 4 2 3 4 4 3 4 3 3 4 3 2 

Ethane 1 4 2 1 4 1 4 1 1 3 4 1 2 1 2 2 4 

Ethanethiol (Ethyl mercaptan) 1 1 4 3 1 3 4 4 4 4 4 4 1 4 4 3 2 3 

Ethanol 1 1 1 1 1 1 2 1 2 4 4 1 1 2 2 1 1 1

1 = Excellent 

2 = Good 

3 = Doubtful 



PERLAST ® 

FEPM 

SBR 

CR 

FEP & PFA 

EPR & EPDM 

ECO 

IIR (Butyl) 

NBR (Nitrile) 

ACM 

AU & EU 



AEM 

HNBR 


CSM 




Ethanol amine 1 1 2 2 1 2 2 2 2 4 3 2 4 4 2 4 3 2 

Ether 1 4 4 3 1 3 3 4 3 3 3 4 3 4 3 3 4 4 

Ethyl acetate 1 4 4 4 1 2 4 2 4 4 4 4 4 4 4 4 4 2 

Ethyl acetoacetate 1 3 4 1 2 4 2 4 4 4 3 4 4 4 4 4 2 

Ethyl acrylate 1 3 4 3 1 3 4 2 4 4 4 4 4 4 4 4 4 2 


Ethyl acrylic acid 1 4 2 1 2 2 4 4 4 4 4 4 4 

Ethyl alcohol 1 1 1 1 1 1 2 1 2 4 4 1 1 3 2 1 1 1 

Ethyl aluminium dichloride 1 4 1 4 4 4 2 4 

Ethyl amine (Monoethylamine) 1 3 3 1 1 2 3 3 4 3 

Ethyl benzene 1 2 4 4 1 1 4 4 4 4 4 4 1 4 4 1 4 4 

Ethyl benzoate 1 3 3 4 1 4 4 4 4 4 4 4 1 4 4 1 4 4 

Ethyl bromide (Bromoethane) 1 1 3 4 1 4 2 4 2 4 3 4 1 4 2 1 4 4 

Ethyl butyl acetate 1 4 1 2 4 4 4 4 

Ethyl butyl alcohol 1 1 2 1 3 2 1 4 4 1 1 1 2 2 

Ethyl butyl ketone 1 4 1 2 4 4 4 4 

Ethyl butyraldehyde 1 4 1 1 4 4 4 4 

Ethyl butyrate 1 4 1 4 4 3 

Ethyl cellosolve 1 4 4 4 1 2 4 2 4 4 4 4 4 4 4 4 4 4 

Ethyl cellulose 1 2 2 1 2 2 2 4 2 2 4 4 4 2 2 

Ethyl chloride 1 2 3 2 1 2 2 1 1 3 2 1 1 4 1 1 4 4 

Ethyl chlorocarbonate 1 2 4 4 1 4 4 4 4 4 4 1 4 4 2 4 4 

Ethyl chloroformate 1 2 4 4 1 4 4 4 4 4 4 1 4 2 4 4 

Ethyl cyanide (Propionitrile) 1 1 4 2 1 3 4 2 1 4 4 1 4 1 3 2 4 

Ethyl cyclopentane 1 2 4 3 1 4 4 1 2 1 4 1 1 1 4 4 

Ethyl ether (Ether) 1 4 4 3 1 3 3 4 3 3 3 4 3 4 3 3 4 4 

Ethyl formate 2 2 4 2 1 2 4 2 4 4 4 4 1 4 4 1 2 4 

Ethyl hexanol 1 1 2 1 1 1 2 1 1 4 4 2 1 1 1 1 2 

Ethyl hexyl acetate 1 4 1 2 4 4 4 4 

Ethyl hexyl alcohol 1 1 2 1 1 1 2 1 2 4 4 2 1 1 2 1 2 

Ethyl iodide 4 1 1 4 4 4 2 1 

Ethyl mercaptan (Ethanethiol) 1 1 4 3 1 3 4 4 4 4 4 4 1 4 4 3 2 3 

Ethyl oxalate 1 1 1 3 1 1 4 1 4 4 4 3 1 4 4 2 4 4 

Ethyl pentachlorobenzene 1 4 4 1 4 3 4 4 4 4 4 1 4 2 4 4 

Ethyl silicate 1 1 2 1 1 1 1 1 1 4 4 2 1 4 1 1 2 1 

Ethyl sulfate 1 1 4 1 1 3 4 4 2 4 

Ethylene (Ethene) 1 2 3 3 1 2 1 2 1 1 2 3 1 3 1 1 3 4 

Ethylene alcohol 1 1 1 1 1 1 1 1 1 4 3 3 1 1 1 1 1 1 

Ethylene bromide 1 4 4 1 4 4 4 4 4 4 1 3 4 4 

Ethylene chloride 1 2 4 4 1 4 4 4 4 4 4 4 1 4 4 3 4 4 

Ethylene chlorohydrin 1 1 2 2 1 2 4 2 4 4 4 2 1 4 4 2 2 3 

Ethylene diamine 2 2 2 1 1 1 1 1 1 4 4 1 4 4 1 4 2 1 

Ethylene dibromide 1 4 4 1 4 4 4 4 4 4 1 3 4 4 

Ethylene dichloride 1 2 4 4 1 4 4 4 4 4 4 4 1 4 4 3 4 4 

Ethylene glycol 1 1 1 1 1 1 2 1 2 4 4 2 1 2 2 1 1 1 

Ethylene oxide (ETO) 1 3 4 4 1 3 4 3 4 4 4 4 4 4 4 4 4 4 

33


1 = Excellent 

2 = Good 

3 = Doubtful 



PERLAST ® 

FEPM 

SBR 

CR 

FEP & PFA 

EPR & EPDM 

ECO 

IIR (Butyl) 

NBR (Nitrile) 

ACM 

AU & EU 



AEM 

HNBR 


CSM 




Ethylene trichloride 1 4 4 4 1 3 4 3 4 4 4 4 1 4 4 3 4 4 

Ethyne (Acetylene) 1 1 2 2 1 1 2 1 1 4 4 2 1 1 1 2 2 

Fatty acids 1 1 4 2 1 3 3 2 4 1 1 2 3 3 

Ferric chloride 1 1 1 2 1 1 1 1 1 3 3 3 1 2 1 1 2 2 

Ferric hydroxide 1 2 1 1 2 4 4 2 

Ferric nitrate 1 1 2 2 1 1 1 1 1 3 3 3 1 2 1 1 1 2 

Ferric sulfate 1 1 2 2 1 1 2 1 1 3 3 3 1 2 1 1 1 1 

Ferrous chloride 1 1 1 2 1 1 1 1 1 3 3 3 1 2 1 1 2 2 

Ferrous sulfate 1 1 2 2 1 1 1 1 1 3 3 3 1 2 1 1 1 2 

Fish oil 1 1 4 3 1 4 1 4 1 1 2 4 1 3 1 1 4 1 

Fluoboric acid (Fluoroboric acid) 1 2 1 1 1 1 1 1 1 2 1 1 

Fluorine 2 4 3 4 3 4 3 4 4 4 4 2 4 4 2 4 4 

Fluorobenzene 1 4 4 1 4 2 4 4 3 4 4 3 4 4 2 4 4 

Fluorochloroethylene 3 4 

Fluorol (Sodium fluoride) 1 1 1 1 1 1 1 

Fluorolube (Fluorocarbon oils) 2 2 4 1 1 1 1 1 2 1 2 1 1 

Fluosilicic acid 1 1 3 2 1 2 2 2 1 2 2 2 4 1 4 

Formaldehyde 1 1 3 3 1 2 2 2 3 4 4 2 4 4 3 4 3 2 

Formamide 1 3 1 2 1 3 2 3 1 

Formic acid 2 3 2 2 1 2 3 2 3 4 4 4 3 2 3 4 3 4 

Freon 11 2 4 4 4 1 4 3 4 2 4 4 4 2 2 2 4 4 

Freon 12 2 4 1 1 1 2 1 2 1 2 2 2 2 1 1 3 1 4 

Freon 13 1 1 1 1 1 1 1 1 1 4 4 1 1 1 3 1 4 

Freon 13b1 2 2 1 1 1 1 1 1 1 1 2 1 2 1 4 

Freon 14 1 1 1 1 1 1 1 1 1 1 1 1 4 

Freon 21 2 4 2 1 4 2 4 4 4 4 4 4 4 

Freon 22 2 2 1 1 1 1 1 4 2 4 2 4 3 4 4 1 4 

Freon 31 2 2 1 1 1 1 4 2 4 4 2 

Freon 32 2 4 1 1 1 1 1 1 1 4 1 3 1 

Freon 112 (Freon BF) 2 4 4 2 1 4 3 4 2 4 2 4 1 2 3 2 4 

Freon 113 (Freon TF) 3 4 2 1 1 4 1 4 1 4 2 3 2 4 1 4 1 4 

Freon 114 3 4 1 1 1 1 1 1 1 4 1 1 2 1 2 1 4 

Freon 114b2 3 4 3 1 1 4 2 4 2 4 4 4 2 2 2 1 4 

Freon 115 3 4 1 1 1 1 1 1 1 4 4 1 2 1 4 1 4 

Freon 134a 2 4 3 2 1 1 3 1 4 2 4 1 1 3 1 2 

Freon 502 3 1 1 1 1 1 2 1 2 2 

Freon C316 2 1 1 1 1 1 1 1 1 1 

Freon C318 3 4 1 1 1 1 1 1 1 2 1 1 

Freon K-142b 3 4 1 1 1 4 1 2 2 2 2 4 1 

Freon K-152a 3 1 1 1 1 1 1 1 4 1 3 

34 

Freon PCA 3 4 2 1 4 4 1 1 4 2 1 1 4 

Freon T-P35 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 

Freon T-WD602 2 2 2 1 2 1 2 1 3 1 2 2 4 

Freon TA 3 3 1 1 1 1 1 1 1 3 1 1 1 

Freon TC 2 2 1 1 2 1 1 1 4 1 1 1 4

1 = Excellent 

2 = Good 

3 = Doubtful 



PERLAST ® 

FEPM 

SBR 

CR 

FEP & PFA 

EPR & EPDM 

ECO 

IIR (Butyl) 

NBR (Nitrile) 

ACM 

AU & EU 



AEM 

HNBR 


CSM 




Freon TMC 2 3 2 1 2 2 2 2 2 1 2 2 3 

Fuel oil 1 1 4 3 1 4 1 4 1 1 3 4 1* 2 1 1 4 4 

Fumaric acid 1 1 2 2 1 2 4 1 4 1 1 4 1 1 2 2 

Furan (Furfuran) 1 4 4 1 3 4 3 4 4 4 4 4 4 4 4 4 4 

Furfural (Furfuraldehyde) 2 3 4 4 1 2 4 2 4 4 4 4 4 4 3 4 4 4 


Furfuryl alcohol 1 2 4 4 1 2 4 2 4 4 4 4 4 4 4 4 4 4 

Gallic acid 1 1 2 3 1 2 2 2 4 4 1 1 4 2 1 2 3 

Gasohol 1 4 4 1 4 4 4 3 4 4 4 1 4 4 2 4 4 

Gasoline 1 3 4 4 1 4 1 4 2 4 3 4 1 3 3 1 4 4 

Gelatin 1 1 1 1 1 1 1 1 1 4 4 1 1 3 1 1 1 1 

Glauber's salt 1 1 4 2 1 2 1 2 4 4 2 1 1 4 1 2 

Gluconic acid 1 4 1 1 1 3 3 1 4 1 3 1 2 2 

Glucose 1 1 1 1 1 1 1 1 1 4 4 1 1 1 1 1 1 1 

Glycerine (Glycerol) 1 1 1 1 1 2 1 1 1 3 4 1 1 1 1 1 1 1 

Glycine 1 2 1 1 1 1 2 2 1 2 

Glycol 1 1 1 1 1 1 2 1 2 4 4 2 1 1 2 1 1 1 

Glycolic acid 1 1 2 1 2 1 1 2 1 1 1 1 

Glycolmonoethylether 1 3 2 1 4 1 1 3 1 

Grease (petroleum base) 1 1 4 2 1 4 2 4 1 1 1 4 1 1 1 1 4 4 

Green Sulfate liquor 2 1 2 2 1 1 1 1 2 4 2 2 1 2 2 2 4 

Halothane 2 1 4 4 1 4 4 4 4 4 4 1 4 2 4 4 

Halowax oil 2 1 4 4 1 4 4 4 4 4 4 1 1 4 1 4 4 

Heavy water 1 1 1 2 1 1 1 1 4 4 1 1 1 1 1 1 

HEF-2 (high energy fuel) 1 1 4 4 1 4 4 2 3 3 3 1 2 2 4 4 

Helium 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 

Heptanal 1 4 1 1 4 4 2 4 

Heptane 1 3 4 2 1 4 1 4 1 1 2 4 1 1 1 1 2 4 

Hexachlorobutadiene 1 4 4 1 4 4 1 4 4 1 4 4 

Hexadecane (Cetane) 1 1 4 2 1 4 4 1 1 4 4 1 1 3 2 4 

Hexalin (Cyclohexanol) 1 1 4 2 1 4 4 4 2 4 4 4 1 3 2 1 3 4 

Hexamine 1 1 1 

Hexane (n-Hexane) 1 3 4 2 1 4 1 4 1 1 1 4 1 2 2 1 2 4 

Hexanedioic acid (Adipic acid) 1 2 1 1 1 2 2 1 1 4 4 1 1 2 1 1 1 1 

Hexanol 1 2 2 1 3 2 2 2 4 4 2 1 1 2 1 2 3 

Hexone (MIBK) 1 4 4 4 1 3 4 3 4 4 4 4 4 4 4 4 4 4 

Hexyl alcohol 1 2 2 1 3 2 2 2 4 4 2 1 1 2 1 2 3 

Hexylene (n-Hexene) 1 3 4 2 1 4 2 4 2 1 2 4 1 3 2 1 2 4 

Hexylene glycol (Brake fluid) 1 4 1 1 1 3 4 1 1 3 3 1 2 

Hydraulic oil (petroleum base) 1 1 4 2 1 4 1 4 1 1 1 4 1 1 1 1 2 2 

Hydrazine (Diamine) 2 2 2 2 1 1 1 2 4 4 4 2 2 

Hydrazine, anhydrous 2 2 1 2 1 2 4 2 4 4 4 4 4 1 1 4 2 

Hydrobromic acid 1 1 4 3 1 1 4 1 4 4 4 1 1 4 4 3 1 4 

Hydrochloric acid, 3 molar 1 1 3 3 1 1 4 1 3 3 4 3 1 3 2 2 4 

Hydrochloric acid, 37% (cold) 1 1 3 3 1 2 4 2 3 4 4 2 1 3 3 2 2 4 

Hydrochloric acid, 37% (hot) 1 1 4 4 1 3 3 3 4 4 4 3 1 3 3 3 4 4 

35


1 = Excellent 

2 = Good 

3 = Doubtful 



PERLAST ® 

FEPM 

SBR 

CR 

FEP & PFA 

EPR & EPDM 

ECO 

IIR (Butyl) 

NBR (Nitrile) 

ACM 

AU & EU 



AEM 

HNBR 


CSM 




Hydrochloric acid, concentrated 1 1 4 4 1 2 4 3 4 4 4 4 1 4 3 3 4 4 

Hydrocyanic acid 1 1 2 2 1 1 2 1 2 4 4 2 1 3 2 2 1 3 

Hydrofluoric acid, concentrated 1 2 3 3 1 3 4 2 4 3 4 3 2 4 4 4 2 4 

Hydrofluosilicic acid 1 1 2 2 1 1 1 2 4 1 1 2 4 1 4 

Hydrogen bromide 1 2 4 3 1 2 4 1 4 4 4 2 2 4 3 1 4 

Hydrogen chloride 1 1 2 4 1 1 1 4 2 1 1 

Hydrogen fluoride (HF) 1 2 4 4 1 4 4 4 4 4 4 4 2 4 4 4 3 4 

Hydrogen fluoride, anhydrous 1 2 4 4 1 2 4 3 4 4 4 4 3 4 4 4 3 4 

Hydrogen gas 1 1 2 1 1 1 1 1 1 2 1 2 1 1 1 3 1 3 

Hydrogen peroxide, 30% 1 1 2 1 1 1 1 1 2 4 4 2 1 4 2 1 2 1 

Hydrogen peroxide, 90% 1 1 4 4 1 3 2 3 3 4 4 4 1 4 3 2 3 2 

Hydrogen sulfide (wet, hot) 1 1 3 2 1 1 2 1 4 4 4 4 3 4 3 3 2 3 

Hydrolube (water/ethylene glycol) 1 1 1 2 1 1 2 1 4 4 1 2 2 

Hydroquinone 2 4 4 1 4 4 3 4 2 3 4 4 2 4 3 

Hydroxyacetic acid 1 1 2 1 2 1 1 2 1 1 1 1 

Hypochlorous acid 1 4 4 1 2 2 2 4 4 2 3 4 3 

Iodine 1 2 2 4 1 2 2 2 2 4 4 4 1 2 1 1 2 3 

Iodine pentafluoride 2 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 

Iodoform 1 4 4 1 4 1 3 4 4 2 3 2 

Iso-butane 1 4 2 1 4 4 1 1 4 4 1 1 1 4 2 

Iso-octane 1 2 4 3 1 4 1 4 1 1 2 4 1 1 1 1 2 4 

Isoamyl acetate 1 4 4 4 1 2 2 4 4 1 4 4 3 1 4 2 

Isoamyl alcohol 1 1 1 1 1 1 1 1 1 1 1 

Isoamyl butyrate 1 4 4 4 1 2 2 4 4 1 4 4 3 1 4 2 

Isoamyl chloride 1 4 4 1 4 3 4 4 2 4 

Isobutyl alcohol (Isobutanol) 1 1 2 1 1 1 2 1 2 4 4 2 1 3 2 2 1 1 

Isobutyl amine 1 2 1 1 2 2 4 3 

Isobutyl chloride 1 2 4 4 1 2 4 3 4 1 4 2 4 1 

Isobutyric acid 1 3 3 1 1 3 4 2 

Isododecane 1 1 4 2 1 4 4 1 4 4 1 1 1 1 2 4 

Isopentane 1 4 2 1 4 4 1 1 4 4 1 1 1 3 2 

Isophorone (Ketone) 1 2 4 4 1 1 4 1 4 4 4 4 4 4 4 4 4 4 

Isopropanol (Isopropyl alcohol) 1 1 2 2 1 1 2 1 2 4 4 1 1 3 2 2 1 1 

Isopropyl acetate 1 4 4 4 1 2 4 2 4 4 4 4 4 4 4 4 4 4 

Isopropyl alcohol (IPA) 1 1 2 2 1 1 2 1 2 4 4 1 1 3 2 2 1 1 

Isopropyl amine 1 2 1 1 2 2 4 3 

Isopropyl benzene 1 3 4 4 1 4 4 4 4 4 4 4 1 4 4 2 4 4 

Isopropyl chloride 1 4 4 4 1 4 4 4 4 4 4 4 1 4 4 2 4 4 

Isopropyl ether 1 4 4 3 1 4 4 4 3 3 3 4 4 4 3 3 3 4 

Isopropyl toluene (Cymene) 1 4 4 1 4 4 4 4 4 4 4 1 4 4 2 4 4 

36 

Kel F liquids 2 3 1 1 1 1 1 2 2 1 1 

Kerosene (Kerosine) 1 2 4 3 1 4 2 4 1 2 1 4 1 2 2 1 3 4 

Lacquer solvents 1 4 4 4 1 4 4 4 4 4 4 4 4 4 4 4 4 4 

Lacquers 1 4 4 4 1 4 4 4 4 4 4 4 4 4 4 4 4 4 

Lactams (Amino acids) 1 3 4 2 1 2 2 4 4 4 4 4 2

1 = Excellent 

2 = Good 

3 = Doubtful 



PERLAST ® 

FEPM 

SBR 

CR 

FEP & PFA 

EPR & EPDM 

ECO 

IIR (Butyl) 

NBR (Nitrile) 

ACM 

AU & EU 



AEM 

HNBR 


CSM 




Lactic acid (cold) 1 1 1 1 1 1 1 1 4 1 1 1 4 1 1 1 2 

Lactic acid (hot) 1 1 4 4 1 4 4 4 4 4 4 4 1 4 4 2 3 2 

Lard 1 1 4 2 1 2 1 2 1 1 2 4 1 1 1 1 3 2 

Lauryl alcohol (n-Dodecanol) 1 1 1 1 2 1 1 1 2 2 

Lavender oil 1 1 4 4 1 4 3 4 2 2 4 4 1 4 3 2 4 4 


Lead acetate 1 4 4 2 1 1 2 1 3 4 4 2 4 4 2 4 4 4 

Lead chloride 1 4 2 1 1 3 4 1 1 3 3 1 1 2 

Lead chromate 1 4 2 1 1 1 3 4 1 1 3 3 1 1 2 

Lead nitrate 1 2 1 1 1 1 2 1 1 4 4 1 1 2 1 1 2 4 

Lead sulfamate 1 2 1 1 1 1 2 4 2 1 4 1 1 2 

Light grease 1 2 4 4 1 4 1 4 1 1 1 4 1 1 1 1 4 4 

Ligroin (Nitrobenzine) 1 2 4 2 1 4 1 4 1 1 2 4 1 4 1 1 3 4 

Lime bleach 1 1 2 2 1 1 2 1 1 4 4 2 1 2 1 1 2 2 

Lime sulfur 1 1 4 1 1 1 1 4 4 4 1 1 1 1 1 

Limonene (Dipentene) 1 3 4 4 1 4 4 4 2 4 4 4 1 4 2 3 4 4 

Lindol (Tritolyl phosphate) 1 1 4 4 1 1 4 1 4 4 4 4 2 4 4 3 4 3 

Linoleic acid 1 1 4 3 1 4 2 4 2 4 3 4 2 4 2 2 4 2 

Linseed oil 1 1 4 3 1 3 1 3 1 1 2 4 1 3 1 1 3 1 

Liquefied petroleum gas (LPG) 1 4 2 1 4 1 4 1 3 1 4 1 4 2 3 4 3 

Liquid oxygen 4 4 4 4 1 4 4 4 4 4 4 4 4 4 4 4 4 4 

Liquimoly 1 1 4 2 1 4 4 1 1 2 4 1 1 1 4 4 

Lithium bromide 1 1 1 2 1 1 1 1 1 2 1 1 1 1 

Lithium chloride 1 1 1 2 1 1 1 1 1 2 1 1 1 1 

Lithium hydroxide 1 4 1 1 1 3 4 3 3 1 1 2 

Lithophone 1 4 1 1 1 3 4 1 1 3 3 1 2 

Lubricating oil (di-ester base) 1 2 4 3 1 4 2 4 2 2 4 4 1 1 2 4 4 

Lubricating oil (petroleum base) 1 1 4 2 1 4 1 4 1 1 2 4 1 1 1 1 4 4 

Lye solution 1 2 2 2 1 1 2 1 2 4 4 2 2 4 2 2 1 2 

Magnesium acetate 1 4 1 2 4 4 4 4 

Magnesium chloride 1 1 1 2 1 1 2 1 1 4 3 1 1 2 1 1 1 1 

Magnesium hydroxide 1 1 2 2 1 1 1 1 2 4 4 2 1 1 2 2 1 3 

Magnesium salts 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 

Magnesium sulfate 1 1 2 2 1 1 2 1 1 4 4 2 1 2 1 1 1 1 

Malathion 1 4 3 1 4 4 2 4 1 2 4 

Maleic acid 1 1 4 4 1 4 4 4 4 3 4 1 1 4 4 3 

Maleic anhydride 1 1 4 4 1 4 4 4 4 4 1 4 4 4 

Malic acid (Apple acid) 1 1 2 2 1 4 4 1 4 1 1 1 1 1 2 2 

Managanese (II) chloride 1 4 1 1 1 1 4 3 3 1 1 

Manganese carbonate 1 4 1 1 1 1 1 4 1 3 3 1 1 2 

Manganese sulfate 1 1 1 1 1 3 1 1 

Mercuric chloride 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 3 

Mercuric cyanide 1 1 2 1 1 2 1 

Mercurous nitrate 1 1 2 1 1 2 1 

Mercury 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 

Mesityl oxide 1 4 4 4 1 2 4 2 4 4 4 4 4 4 4 4 4 4 

37


1 = Excellent 

2 = Good 

3 = Doubtful 



PERLAST ® 

FEPM 

SBR 

CR 

FEP & PFA 

EPR & EPDM 

ECO 

IIR (Butyl) 

NBR (Nitrile) 

ACM 

AU & EU 



AEM 

HNBR 


CSM 




Methacrylacid methylester 1 4 4 1 2 2 4 4 4 4 4 4 4 

Methacrylic acid 1 2 2 1 2 4 3 4 4 4 

Methane 1 2 4 2 1 4 1 4 1 1 3 4 1 2 1 2 2 4 

Methanol (Methyl alcohol) 1 1 1 1 1 1 2 1 2 4 4 1 1 1 1 2 1 2 

Methyl acetate 1 4 4 3 1 2 4 2 4 4 4 4 4 4 4 4 4 4 

Methyl acetoacetate 1 4 4 4 1 2 4 2 4 4 4 4 4 4 4 4 4 3 

Methyl acrylate 1 4 4 2 1 2 4 2 4 4 4 4 4 4 4 4 4 4 

Methyl acrylic acid (Crotonic acid) 1 4 2 1 2 2 4 4 4 4 3 4 4 4 4 

Methyl alcohol (Methanol) 1 1 1 1 1 1 2 1 2 4 4 1 1 1 1 2 1 2 

Methyl amine 1 2 2 1 2 1 4 2 2 1 

Methyl amyl acetate 1 1 1 4 

Methyl amyl alcohol 1 1 1 1 1 1 4 1 

Methyl benzoate 1 1 4 4 1 4 4 4 4 4 4 4 1 4 4 1 4 4 

Methyl bromide 1 2 4 4 1 4 4 4 2 3 4 4 1 3 2 1 4 3 

Methyl butyl ketone 1 4 4 4 1 2 4 2 4 4 4 4 4 4 4 4 4 3 

Methyl butyrate 1 4 1 4 4 

Methyl carbonate 1 1 4 4 1 4 4 4 4 4 4 1 4 2 4 4 

Methyl cellosolve 1 1 4 3 1 2 4 2 3 4 4 4 4 4 4 4 4 4 

Methyl cellulose 1 1 2 2 1 2 2 2 4 2 2 4 1 2 4 2 2 

Methyl chloride 1 4 4 4 1 3 4 3 4 4 4 4 2 4 4 2 4 4 

Methyl chloroformate 1 1 4 4 1 4 4 4 4 4 4 1 4 2 4 4 

Methyl cyanide (Acetonitrile) 1 1 1 1 1 2 1 2 1 

Methyl cyclopentane 1 4 4 4 1 4 4 4 4 4 4 4 1 4 4 2 4 4 

Methyl dichloride 1 4 4 1 3 4 3 4 4 4 4 1 4 2 4 4 

Methyl ether 1 4 2 3 1 2 4 2 2 4 4 3 1 4 1 1 4 1 

Methyl ethyl ketone (MEK) 1 4 4 4 1 2 4 2 4 4 4 4 4 4 4 4 4 4 

Methyl ethyl ketone peroxide 1 4 4 4 1 3 4 3 4 4 4 4 4 4 4 4 4 2 

Methyl formate 1 4 4 2 1 2 4 2 4 4 4 4 3 4 4 4 2 3 

Methyl glycol acetate 1 2 3 1 1 2 4 4 4 3 4 2 2 

Methyl iodide 1 4 1 1 4 

Methyl isobutyl ketone (MIBK) 1 4 4 4 1 3 4 3 4 4 4 4 4 4 4 4 4 4 

Methyl isopropyl ketone 1 4 4 4 1 2 4 2 4 4 4 4 4 4 4 4 4 4 

Methyl mercaptan 1 1 1 1 

Methyl methacrylate (MMA) 1 3 4 4 1 3 4 3 4 4 4 4 4 4 4 4 4 3 

Methyl oleate 1 2 4 4 1 2 4 2 4 4 4 4 1 4 4 2 4 3 

Methyl phenyl ether (Anisole) 1 4 4 1 4 4 3 

Methyl propyl ketone 1 4 4 1 2 2 4 4 4 4 

Methyl salicylate 1 3 3 4 1 2 4 2 4 4 4 3 4 4 4 4 4 3 

Methylene bromide 1 4 4 1 4 4 4 2 4 

Methylene chloride 1 2 4 4 1 4 4 4 4 4 4 4 2 4 4 2 4 4 

38 

Methylene dichloride 1 2 4 4 1 4 4 4 4 4 4 4 2 3 2 4 4 

MIL- spec fluids 

Contact technical department 

Milk 1 1 1 1 1 1 4 1 

Mineral oil 1 1 4 2 1 3 1 3 1 1 1 4 1 2 1 1 2 2 

Monobromo benzene 1 2 4 4 1 4 4 4 4 4 4 4 1 4 4 2 4 4

1 = Excellent 

2 = Good 

3 = Doubtful 



PERLAST ® 

FEPM 

SBR 

CR 

FEP & PFA 

EPR & EPDM 

ECO 

IIR (Butyl) 

NBR (Nitrile) 

ACM 

AU & EU 



AEM 

HNBR 


CSM 




Monochloro acetic acid 1 4 4 1 2 4 3 4 4 4 4 4 4 4 4 4 4 

Monochloro acetone 1 4 2 1 1 4 2 4 4 4 3 4 4 4 4 3 4 

Monochloro benzene 1 4 4 4 1 4 4 4 4 4 4 4 1 4 4 2 4 4 

Monoethanolamine (MEA) 1 1 2 4 1 2 4 2 4 4 4 2 4 4 4 4 4 2 

Monoethylamine (Ethyl amine) 1 3 3 1 1 2 3 3 4 3 


Monomethyl amine (MMA) 1 1 1 3 1 1 3 3 1 

Monomethyl aniline 1 2 4 4 1 2 4 2 4 4 4 4 2 4 4 2 4 2 

Monomethyl ether 1 3 2 1 4 1 1 3 1 4 

Monomethyl hydrazine 1 1 2 2 1 1 1 2 2 2 4 

Monovinyl acetylene 1 2 2 2 1 1 1 1 2 1 1 2 2 

Morpholine 1 4 2 1 2 4 2 4 4 4 4 1 4 4 4 2 4 

Mustard gas 1 3 3 1 3 1 3 1 1 1 1 

n-Dodecanol (Lauryl alcohol) 1 1 1 1 2 1 1 1 2 2 

n-Heptane 1 3 4 2 1 4 1 4 1 1 1 4 1 3 2 1 2 4 

n-Hexaldehyde 1 4 1 1 1 4 2 4 4 3 4 4 4 4 4 3 2 

n-Hexane 1 2 4 2 1 4 1 4 1 1 2 4 1 1 2 1 2 4 

n-Hexanol 1 2 2 1 3 2 3 1 4 4 2 1 4 2 2 2 2 

n-Hexene (Hexylene) 1 3 4 2 1 4 2 4 2 1 2 4 1 3 2 1 2 4 

n-Octane 1 4 4 1 4 2 4 2 4 4 4 1 3 2 2 4 4 

n-Pentane 1 3 2 1 4 1 4 1 1 4 4 1 3 1 3 2 4 

n-Propyl acetate (Propyl acetate) 1 4 4 4 1 2 4 2 4 4 4 4 4 4 4 4 4 4 

n-Propyl acetone 1 4 4 1 1 4 1 4 4 4 4 4 4 4 4 4 

n-Propyl nitrate (NPN) 1 4 4 1 2 4 2 4 4 4 4 4 4 4 4 4 4 

Naphtha 1 2 4 4 1 4 1 4 2 2 2 4 1 4 2 2 4 4 

Naphtha coal tar (Benzol) 1 3 4 4 1 4 4 4 4 4 4 4 1 4 4 1 4 4 

Naphthalene (Tar camphor) 1 2 4 4 1 4 4 4 4 4 3 4 1 4 4 1 4 4 

Naphthenic acid 1 1 4 4 1 4 2 4 2 4 4 4 1 4 3 1 4 4 

Natural gas 1 1 3 2 1 4 1 4 1 2 2 2 1 2 1 2 2 4 

Neatsfoot oil 1 1 4 4 1 2 1 2 1 1 1 4 1 3 1 1 4 2 

Neohexane 1 4 2 1 4 4 1 1 4 4 1 2 1 4 4 

Neon 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 

Neville acid 1 1 4 4 1 2 2 4 4 4 1 4 4 2 4 4 

Nickel acetate (Diacetate) 1 4 4 2 1 1 3 1 3 4 4 3 4 4 2 4 4 4 

Nickel chloride 1 1 2 2 1 1 2 1 1 3 3 3 1 2 1 1 1 1 

Nickel nitrate (Dinitrate) 1 1 1 1 1 1 1 1 1 1 1 

Nickel salts 1 1 2 2 1 1 2 1 1 3 3 2 1 2 1 1 1 1 

Nickel sulfate 1 1 2 2 1 1 2 1 1 4 3 3 1 2 1 1 1 1 

Niter cake 1 1 1 1 1 1 1 1 1 4 1 1 1 1 1 1 1 1 

Nitric acid (3 molar) 1 2 4 4 1 2 4 1 4 4 4 4 1 4 3 3 4 4 

Nitric acid (concentrated) 1 2 4 4 1 4 4 1 4 4 4 4 1 4 4 3 4 4 

Nitric acid (red fuming) (RFNA) 2 3 4 4 1 4 4 2 4 4 4 4 3 4 4 4 4 4 

Nitrobenzene 1 1 4 4 1 4 4 4 4 4 4 4 2 4 4 4 4 4 

Nitrobenzine (Ligroin) 1 2 4 2 1 4 1 4 1 1 2 4 1 4 1 1 3 4 

Nitroethane 1 2 2 2 1 2 4 2 4 4 4 2 4 4 4 4 2 4 

Nitrogen 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 

39


1 = Excellent 

2 = Good 

3 = Doubtful 



PERLAST ® 

FEPM 

SBR 

CR 

FEP & PFA 

EPR & EPDM 

ECO 

IIR (Butyl) 

NBR (Nitrile) 

ACM 

AU & EU 



AEM 

HNBR 


CSM 




Nitrogen tetroxide 1 3 4 4 1 4 4 3 4 4 4 4 4 4 4 4 4 4 

Nitromethane 1 3 3 3 1 2 4 2 4 4 4 2 4 4 4 4 2 4 

Nitropropane 1 2 4 4 1 2 4 2 4 4 4 4 4 4 4 4 4 4 

Nitrous acid 1 4 1 1 3 1 3 3 1 2 

o-Chloronaphthalene 1 4 4 1 4 4 4 4 4 4 4 1 4 4 2 4 4 

o-Cresol (Cresylic acid) 1 1 4 4 1 4 4 4 4 4 4 4 1 4 2 2 4 4 

o-Dichlorobenzene 1 4 4 1 4 4 4 4 4 4 4 1 4 4 2 4 4 

Octachlorotoluene 1 4 4 1 4 4 4 4 4 4 1 2 4 4 

Octadecane 1 1 4 2 1 4 4 1 2 1 4 1 2 1 2 4 

Octanol (Octyl alcohol) 1 1 2 2 1 1 2 2 2 4 4 2 1 2 2 2 2 2 

Octyl acetate 1 4 1 2 4 4 4 4 

Octyl alcohol (Octanol) 1 1 2 2 1 1 2 2 2 4 4 2 1 2 2 2 2 2 

Oleic acid 1 1 4 4 1 4 2 4 3 4 3 4 1 4 4 2 4 4 

Olein (Triolene) 1 4 4 1 4 2 3 2 4 4 2 3 4 

Oleum (fuming sulfuric acid) 1 1 4 4 1 4 4 4 4 4 4 4 1 4 3 4 4 4 

Olive oil 1 1 4 2 1 2 2 2 1 1 1 4 1 3 1 1 2 1 

Orthochloroethylbenzene 1 4 4 4 4 4 4 4 4 4 1 4 2 4 4 

Oxalic acid 1 1 2 2 1 1 3 1 2 4 4 2 1 4 2 1 2 2 

Oxygen (100 to 200°C) 1 2 4 4 1 4 4 4 4 4 4 4 2 4 3 4 4 2 

Oxygen (below 100°C) 1 1 4 1 2 1 2 1 2 2 1 2 1 1 1 1 1 1 

Ozone (50 PPHM) 1 1 4 2 1 1 1 1 2 1 1 4 1 1 1 1 1 1 

Paint thinner (Duco) 1 2 4 4 1 4 4 4 4 4 4 4 2 4 4 3 4 4 

Palmitic acid 1 1 3 2 1 2 2 2 2 4 3 3 1 4 1 1 3 4 

Par-al-ketone 1 4 4 4 1 4 4 4 4 4 4 4 4 4 4 

Para-dichlorobenzene 1 3 4 4 1 4 4 4 4 4 4 1 4 2 4 4 

Paraffins 1 4 1 1 4 1 4 1 1 1 4 1 1 1 1 1 1 

Paraldehyde 1 2 1 1 1 4 3 4 

Peanut oil 1 1 4 3 1 3 1 3 1 1 2 4 1 2 1 1 3 1 

Penicillin 1 1 1 3 1 4 

Pentachloroethane (Pentalin) 1 4 4 1 4 4 4 1 4 

Pentachlorophenol (PCP) 1 4 1 4 4 1 

Pentane (Amyl hydride) 1 4 2 1 4 4 1 1 4 4 1 3 3 4 

Pentanol 1 1 2 2 1 1 1 1 2 4 4 2 2 2 2 1 2 4 

Pentyl alcohol (Amyl alcohol) 1 1 2 2 1 1 1 1 2 4 4 2 2 2 2 1 2 4 

Pentyl amine (Amyl amine) 1 2 1 1 2 2 3 

Perchloric acid 1 2 4 2 1 2 3 2 4 4 4 4 1 4 1 2 4 

Perchloroethylene (Perchlor) 1 4 4 4 1 4 3 4 3 4 4 4 1 4 3 2 4 4 

Petrolatum 1 1 4 2 1 4 1 4 1 1 1 4 1 1 1 1 2 4 

Petroleum oil (above 1) 1 1 4 4 1 4 2 4 4 4 4 4 1 2 2 4 4 4 

Petroleum oil (below 1) 1 1 4 2 1 4 1 4 1 2 2 4 1 1 1 2 2 2 

40 

Petroleum oil, crude 1 1 4 2 1 4 4 1 1 1 4 1 1 1 1 2 4 

Phenol (Carbolic acid) 1 1 4 4 1 2 4 2 4 4 4 4 1 4 4 1 4 4 

Phenol sulfonic acid 1 4 1 3 4 4 2 4 

Phenyl acetate 1 4 4 1 2 4 4 4 

Phenyl benzene 1 2 4 4 1 4 4 4 4 4 4 4 1 4 4 2 4 4

1 = Excellent 

2 = Good 

3 = Doubtful 



PERLAST ® 

FEPM 

SBR 

CR 

FEP & PFA 

EPR & EPDM 

ECO 

IIR (Butyl) 

NBR (Nitrile) 

ACM 

AU & EU 



AEM 

HNBR 


CSM 




Phenyl ether (Diphenyl oxide) 1 2 4 4 1 4 4 4 4 4 4 4 1 1 4 2 4 3 

Phenyl ethyl ether (Phenetole) 1 4 4 4 1 4 4 4 4 4 4 4 4 4 4 4 4 4 

Phenyl hydrazine 1 1 2 4 1 4 4 4 4 1 1 4 4 2 4 3 

Phenyl methyl ketone 1 4 4 1 1 4 1 4 4 4 4 4 4 4 4 4 4 

Phorone 1 4 4 4 1 2 4 2 4 4 4 4 4 4 4 4 4 4 


Phosgene 1 1 1 1 1 2 2 2 

Phosphate esters 1 2 4 4 1 1 1 4 4 4 4 1 4 3 4 4 

Phosphoric acid (3 molar) 1 1 2 3 1 1 3 3 4 3 4 2 1 4 2 2 2 2 

Phosphoric acid (concentrated) 1 2 3 4 1 2 4 3 4 3 4 3 1 4 3 2 3 3 

Phosphorus oxychloride 1 4 1 4 

Phosphorus trichloride 1 1 4 4 1 1 4 1 4 4 4 4 1 4 4 1 4 4 

Phthalic acid 1 2 2 1 2 1 3 4 2 1 

Phthalic anhydride 1 4 1 1 2 

Picric acid, H2 1 2 2 2 1 1 4 1 2 4 4 2 1 4 2 2 1 4 

Pine oil 1 1 4 3 1 4 2 4 2 4 3 4 1 4 2 1 4 4 

Pinene 1 1 4 3 1 4 2 4 2 4 3 4 1 4 2 1 4 4 

Piperidine 1 4 4 1 4 4 4 4 4 4 4 4 4 4 4 4 4 

Plating solution, chrome 1 1 4 4 1 1 2 4 4 4 4 1 4 4 4 4 

Pneumatic service 1 1 4 1 1 1 1 1 1 4 1 4 1 1 1 4 1 4 

Potassium acetate 1 1 4 2 1 1 3 1 2 4 4 2 4 4 4 4 4 4 

Potassium bicarbonate 1 1 1 1 2 1 4 3 1 1 1 1 2 

Potassium bisulfate 1 1 1 2 1 1 1 1 4 1 1 1 1 

Potassium bisulfite 1 1 1 1 1 1 1 1 1 1 1 1 

Potassium bromide 1 1 1 2 1 1 1 1 4 1 1 1 1 

Potassium carbonate (Potash) 1 1 1 1 1 1 1 1 1 1 1 1 1 1 

Potassium chlorate 1 1 2 2 1 1 1 4 4 2 1 1 

Potassium chloride 1 1 1 1 1 1 2 1 1 3 3 1 1 2 1 1 1 1 

Potassium chromate 1 1 2 1 1 1 2 1 1 3 3 2 1 2 1 3 1 

Potassium copper cyanide 1 1 1 1 1 1 2 1 1 3 3 1 1 2 1 1 1 1 

Potassium cyanide 1 1 1 1 1 1 2 1 1 3 3 1 1 2 1 1 1 1 

Potassium dichromate 1 1 2 1 1 1 2 1 1 3 3 1 1 2 1 1 1 1 

Potassium ferricyanide 1 2 1 1 1 4 2 1 

Potassium ferrocyanide 1 1 1 4 1 4 

Potassium fluoride 1 2 1 1 2 1 

Potassium hydroxide, 50% 1 1 2 2 1 1 2 1 3 4 4 2 4 4 2 3 1 3 

Potassium hypochlorite 1 2 3 1 1 3 3 2 2 3 

Potassium iodate 1 4 1 1 3 4 1 3 3 1 2 

Potassium iodide 1 1 1 1 1 1 2 1 1 4 4 1 1 2 1 1 1 1 

Potassium nitrate 1 1 1 2 1 1 2 1 1 3 3 1 1 2 1 1 1 1 

Potassium nitrite 1 1 1 2 1 1 2 1 1 3 3 1 1 2 1 1 1 1 

Potassium oxalate 1 4 1 1 1 3 4 1 3 3 1 2 

Potassium perchlorate 1 1 3 2 1 1 2 1 2 4 4 3 1 2 1 1 1 1 

Potassium permanganate 1 4 2 1 1 2 1 3 4 4 4 1 2 1 1 3 1 

Potassium persulfate 1 4 2 1 1 2 1 4 4 4 4 1 2 2 1 1 1 

Potassium phosphate 1 1 1 1 1 1 1 

41


1 = Excellent 

2 = Good 

3 = Doubtful 



PERLAST ® 

FEPM 

SBR 

CR 

FEP & PFA 

EPR & EPDM 

ECO 

IIR (Butyl) 

NBR (Nitrile) 

ACM 

AU & EU 



AEM 

HNBR 


CSM 




Potassium salts 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 

Potassium silicate 1 1 1 1 1 1 1 1 1 1 1 1 

Potassium sulfate 1 1 2 2 1 1 2 1 1 4 3 2 1 3 1 1 2 1 

Potassium sulfide 1 1 1 1 1 1 1 1 1 1 1 1 

Potassium sulfite 1 1 2 2 1 1 2 1 2 4 4 2 1 2 1 1 1 1 

Potassium tartrate 1 1 1 1 3 4 1 1 3 3 1 1 2 

Potassium thiocyanate 1 1 1 1 3 4 1 3 3 1 

Producer gas 1 1 4 2 1 4 4 1 2 1 4 1 1 1 2 2 2 

Propane (LPG) 1 1 4 2 1 4 1 4 1 1 3 4 1 2 1 2 3 4 

Propanol (Propyl alcohol) 1 1 1 1 1 1 2 1 2 4 3 1 1 3 1 1 1 2 

Propionaldehyde (Propanal) 1 1 1 4 3 4 

Propionic acid 1 1 3 1 1 1 3 1 

Propionitrile (Ethyl cyanide) 1 1 4 2 1 3 4 2 1 4 4 1 4 1 3 2 4 

Propyl acetate (n-Propyl acetate) 1 4 4 4 1 2 4 2 4 4 4 4 4 4 4 4 4 4 

Propyl alcohol (1-Propanol) 1 1 1 1 1 1 2 1 2 4 3 1 1 3 1 1 1 2 

Propyl amine 1 4 4 1 4 4 4 4 4 4 4 4 4 4 4 4 4 

Propyl nitrate (n-Propyl nitrate) 1 4 4 1 2 4 2 4 4 4 4 4 4 4 4 4 4 

Propylene (Propene) 1 1 4 4 1 4 4 4 4 4 4 4 1 4 4 2 4 4 

Propylene chlorohydrin 1 4 1 4 4 4 3 

Propylene dichloride 1 4 4 1 4 4 4 4 2 4 4 

Propylene glycol 1 1 1 2 1 1 1 1 1 1 1 

Propylene oxide 1 3 4 4 1 2 4 2 4 4 4 4 3 4 4 4 4 4 

Pyridene 1 2 4 4 1 2 4 2 4 4 4 4 3 4 4 4 4 4 

Pyrogallol (Pyrogallic acid) 1 3 1 3 3 4 1 

Pyrrole (Azole) 1 3 4 1 3 4 4 4 4 4 3 4 4 4 4 4 3 

Quinine (Bisulfate) (Sulfate) 1 1 2 4 2 3 2 2 

Quinone 1 1 4 4 2 4 1 2 

Radiation 

Contact technical department 

Rapeseed oil 1 1 4 3 1 2 1 2 1 1 2 4 1 3 1 1 3 3 

Red oil (MIL-H-5606) 1 2 4 2 1 4 1 4 1 1 1 4 1 4 1 1 2 4 

RJ-1 (MIL-F-25576) 1 1 4 2 1 4 1 4 1 1 1 4 1 1 1 1 2 4 

Rosin 1 3 1 4 1 4 4 1 1 2 2 

Rotenone 1 1 1 1 1 1 1 

RP-1 (MIL-F-25576) 1 1 4 2 1 4 1 4 1 1 1 4 1 1 1 1 2 4 

Sal ammoniac 1 1 1 1 1 1 1 1 1 3 3 2 1 2 1 2 1 3 

Salicylic acid 1 1 2 1 1 1 2 1 1 4 4 2 1 4 1 1 1 1 

Sea water (Brine) 1 1 1 2 1 1 2 1 1 4 4 1 1 1 1 1 1 1 

Sewage 1 1 1 2 1 1 1 1 4 4 1 1 1 1 1 1 1 

Silicate esters 1 1 4 1 1 4 2 4 2 4 3 4 1 4 2 1 2 4 

Silicone grease 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 2 2 3 

42 

Silicone oil 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 4 

Silicone tetrachloride 2 1 1 

Silver bromide 1 4 1 1 1 4 3 

Silver chloride 1 4 1 1 1 3 4 1 3 3 

Silver cyanide 1 4 1 1 1 4 4 1 1 4

1 = Excellent 

2 = Good 

3 = Doubtful 



PERLAST ® 

FEPM 

SBR 

CR 

FEP & PFA 

EPR & EPDM 

ECO 

IIR (Butyl) 

NBR (Nitrile) 

ACM 

AU & EU 



AEM 

HNBR 


CSM 




Silver nitrate 1 1 1 1 1 1 3 1 1 3 3 1 1 2 1 1 1 1 

Skydrol 500 1 1 4 4 1 1 4 2 4 4 4 4 4 4 4 3 4 3 

Skydrol 7000 1 1 4 4 1 1 4 1 4 4 4 4 2 4 4 3 4 3 

Soap solutions 

See Detergent solution 

Sodium acetate 1 2 4 2 1 1 3 1 2 3 3 2 4 4 4 4 4 4 


Sodium aluminate 1 1 1 1 1 1 1 1 1 1 

Sodium arsenite 1 3 4 1 1 3 3 4 3 3 3 

Sodium benzoate 1 1 1 1 1 1 2 1 1 4 4 1 1 1 1 1 1 1 

Sodium bicarbonate (Baking soda) 1 1 1 1 1 1 2 1 1 4 4 1 1 1 1 1 1 1 

Sodium bichromate 1 1 1 1 1 1 2 1 1 4 4 2 1 2 1 1 3 1 

Sodium bisulfate 1 1 2 1 1 1 1 1 1 4 2 1 1 1 1 1 1 

Sodium bisulfite 1 1 4 1 1 1 2 1 3 2 4 4 1 2 1 1 1 1 

Sodium borate (Borax) 1 1 2 4 1 1 1 1 2 3 3 2 1 1 1 2 4 2 

Sodium bromate 1 1 4 1 1 3 4 1 1 3 1 2 

Sodium bromide 1 1 4 1 1 1 1 3 4 1 1 1 3 1 1 2 

Sodium carbonate (Soda ash) 1 1 1 1 1 1 2 1 1 4 4 1 1 1 1 1 1 1 

Sodium chlorate 1 1 3 1 1 1 2 1 2 4 4 3 1 2 1 1 1 1 

Sodium chloride 1 1 1 1 1 1 2 1 1 4 3 1 1 1 1 1 1 1 

Sodium chlorite 1 2 1 1 4 1 

Sodium chromate 1 1 1 1 1 1 2 1 1 4 4 1 1 2 1 1 3 1 

Sodium citrate 1 4 1 1 1 3 3 3 1 3 

Sodium cyanide 1 1 1 1 1 1 2 1 1 4 4 1 1 2 1 1 1 1 

Sodium dichromate 1 1 1 1 1 1 2 1 1 4 4 1 1 2 1 1 1 1 

Sodium ethylate 1 4 1 1 1 3 4 3 3 1 3 

Sodium ferricyanide 1 4 1 1 1 1 3 4 1 1 3 3 1 1 2 

Sodium ferrocyanide 1 4 1 1 1 3 4 1 3 3 1 2 

Sodium fluoride (Fluorol) 1 1 1 1 1 1 1 

Sodium hydrogen sulfate 1 1 2 1 1 1 1 1 1 4 2 1 1 1 1 1 1 

Sodium hydrogen sulfite 1 1 2 1 1 1 1 1 1 4 4 3 1 1 1 1 1 1 

Sodium hydroxide (Caustic soda) 1 1 2 2 1 1 2 1 1 4 3 2 3 4 1 2 1 2 

Sodium hypochlorite, 20% 1 1 3 3 1 2 2 2 2 4 4 3 1 4 2 2 4 2 

Sodium hyposulfite 1 1 2 1 1 1 1 1 2 4 3 2 1 2 1 1 1 

Sodium iodide 1 4 1 1 1 3 4 1 3 3 1 2 

Sodium lactate 1 1 1 1 3 4 1 1 3 3 1 2 

Sodium metaphosphate 1 1 1 2 1 1 1 1 1 1 1 1 2 

Sodium metasilicate 1 1 1 1 1 1 

Sodium nitrate 1 1 2 2 1 1 2 1 2 4 4 2 1 2 1 1 1 4 

Sodium nitrite 1 1 2 2 1 1 2 1 2 4 4 2 1 2 1 1 1 4 

Sodium oleate 1 4 1 1 1 3 4 1 3 3 1 2 

Sodium oxalate 1 1 1 1 1 1 

Sodium perborate 1 1 3 2 1 1 2 1 2 4 4 3 1 2 1 1 2 2 

Sodium perchlorate 1 1 

Sodium peroxide 1 1 2 2 1 1 1 2 4 4 2 1 4 2 1 2 4 

Sodium persulfate 1 1 1 1 1 

Sodium phosphate (Di-basic) 1 1 1 2 1 1 2 1 1 3 3 1 1 2 1 1 1 4 

43


1 = Excellent 

2 = Good 

3 = Doubtful 



PERLAST ® 

FEPM 

SBR 

CR 

FEP & PFA 

EPR & EPDM 

ECO 

IIR (Butyl) 

NBR (Nitrile) 

ACM 

AU & EU 



AEM 

HNBR 


CSM 




Sodium phosphate (Mono-basic) 1 1 1 2 1 1 2 1 1 3 3 1 1 2 1 1 1 4 

Sodium phosphate (Tri-basic) 1 1 1 2 1 1 2 1 1 3 3 1 1 2 1 1 1 3 

Sodium pyrophosphate 1 4 1 1 1 3 4 1 3 3 1 2 

Sodium salts 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 

Sodium silicate 1 1 1 1 1 1 2 1 1 4 4 1 1 2 1 1 1 1 

Sodium sulfate 1 1 3 2 1 1 2 1 1 4 3 2 1 3 1 1 1 1 

Sodium sulfide 1 1 2 1 1 1 2 1 2 4 3 2 2 4 1 2 2 2 

Sodium sulfite 1 1 2 1 1 1 2 1 1 4 1 2 1 4 1 1 1 1 

Sodium tartrate 1 4 1 1 1 3 4 1 3 3 1 2 

Sodium tetraborate 1 1 1 1 1 1 1 

Sodium thiosulfate 1 1 2 1 1 1 1 1 2 4 3 2 1 2 1 1 1 1 

Sour crude oil 2 2 4 4 4 2 4 4 

Sour natural gas 1 1 4 4 4 4 2 4 4 

Soybean oil 1 1 4 3 1 3 1 3 1 1 2 4 1 3 1 1 3 1 

Stannic chloride 1 2 1 3 1 1 2 2 1 4 4 1 1 2 1 1 4 2 

Stannic chloride, 50% 1 2 1 3 1 1 2 1 1 4 4 1 1 4 1 1 4 2 

Stannous chloride, 15% 1 1 1 2 1 1 2 1 1 4 4 1 1 4 1 1 1 2 

Starch 1 1 1 1 1 1 1 1 1 4 4 1 1 1 1 1 1 1 

Stauffer 7700 1 2 4 4 1 4 4 2 2 4 1 2 2 4 4 

Steam (to 150°C) 1 1 4 3 1 1 4 1 4 4 4 4 1 2 1 4 4 3 

Steam (to 175°C) 1 1 4 4 1 1 4 4 4 4 4 4 1 4 3 4 4 4 

Steam (to 200°C) 1 1 4 4 1 4 4 4 4 4 4 4 1 4 4 4 4 4 

Steam (to 260°C) 2 3 4 4 1 4 4 4 4 4 4 4 3 4 4 4 4 4 

Stearic acid 1 1 3 3 1 3 3 3 3 4 3 3 2 4 2 2 3 3 

Stoddard solvent 1 2 4 2 1 4 1 4 1 1 1 4 1 1 1 1 4 4 

Styrene (Vinylbenzene) Monomer 1 2 4 4 1 4 4 4 4 4 4 4 2 4 4 3 4 4 

Succinic acid 1 1 1 2 1 1 1 1 4 2 1 1 1 1 

Sucrose solution 1 1 1 2 1 1 2 1 1 4 4 1 1 2 1 1 2 1 

Sulfamic acid 1 2 2 1 1 1 2 2 2 

Sulfur 1 1 4 1 1 1 3 1 4 4 4 4 1 4 1 1 1 

Sulfur chloride 1 1 4 4 1 4 4 4 4 4 4 4 1 4 4 2 4 3 

Sulfur dioxide (dry) 1 2 2 4 1 1 3 2 4 4 4 3 4 4 3 2 4 2 

Sulfur dioxide (wet) 1 2 3 3 1 1 1 4 4 4 4 4 4 3 2 3 2 

Sulfur hexafluoride 2 2 4 1 1 1 1 1 2 4 4 4 2 4 2 2 2 2 

Sulfur trioxide (dry) 1 2 4 4 1 3 4 3 4 4 4 3 1 4 4 2 4 3 

Sulfur, molten 1 1 4 3 1 3 3 4 4 4 4 1 1 3 4 3 

Sulfuric acid (3 molar) 1 1 3 3 1 2 2 3 4 2 3 3 1 4 3 3 3 4 

Sulfuric acid (concentrated) 1 1 4 4 1 4 4 4 4 4 4 4 1 4 4 4 4 4 

Sulfuric acid, fuming 1 2 4 4 1 4 4 4 4 4 4 4 2 4 4 4 4 4 

Sulfurous acid 1 1 2 2 1 2 2 2 4 4 2 1 4 2 3 1 4 

44 

Sulfuryl chloride 1 2 2 1 2 2 4 2 1 1 

Tannic acid 1 1 3 2 1 1 2 2 2 4 3 1 1 4 1 1 2 2 

Tar, bituminous 1 1 4 3 1 4 2 4 2 4 3 3 1 3 2 1 4 2 

Tartaric acid 1 1 2 2 1 2 2 2 1 4 3 2 1 4 1 1 1 1 

Terpineol (Terpilenol) 1 4 4 1 3 2 3 2 4 2 4 1 4 3 1 4 4

1 = Excellent 

2 = Good 

3 = Doubtful 



PERLAST ® 

FEPM 

SBR 

CR 

FEP & PFA 

EPR & EPDM 

ECO 

IIR (Butyl) 

NBR (Nitrile) 

ACM 

AU & EU 



AEM 

HNBR 


CSM 




Tertiary butyl alcohol 1 1 2 2 1 2 2 2 2 4 4 2 1 3 2 2 2 2 

Tertiary butyl catechol 1 2 3 2 1 2 2 4 4 4 4 1 4 1 2 3 

Tertiary butyl mercaptan 1 1 4 4 1 4 4 4 4 4 4 1 4 4 4 4 

Tetrabromoethane 1 3 4 4 1 4 4 4 4 4 4 4 1 4 4 2 4 4 

Tetrabromomethane 1 4 4 1 4 4 4 4 4 4 4 1 4 4 2 4 4 


Tetrabutyl titanate (TBT) 1 1 2 2 1 1 2 2 2 1 2 1 1 2 

Tetrachlorodifluoroethane 1 3 2 1 4 3 4 2 4 4 4 1 4 4 2 4 

Tetrachloroethane 1 4 4 4 1 4 4 4 4 4 4 4 1 4 4 2 4 4 

Tetrachloroethylene 1 4 4 4 1 4 4 4 4 4 4 4 1 4 4 2 4 4 

Tetrachloromethane 1 4 4 4 1 4 2 4 3 4 3 4 1 4 3 2 4 4 

Tetraethyl lead 1 3 3 3 1 4 2 4 2 4 4 4 1 4 2 2 4 4 

Tetraethylene glycol (TEG) 1 1 1 1 1 1 1 1 1 

Tetrafluoromethane 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 3 1 4 

Tetrahydrofuran (THF) 1 4 4 4 1 3 4 3 4 4 4 4 4 4 4 4 4 4 

Tetralin (Tetrahydronaphthalene) 1 4 4 4 1 4 4 4 4 4 3 4 1 4 4 1 4 4 

Thioglycolic acid 1 4 1 1 1 3 4 1 3 3 1 2 

Thionyl chloride 1 4 4 1 4 4 4 4 4 4 4 1 4 4 4 4 4 

Thiophene (Thiofuran) 1 4 4 1 4 4 4 4 3 4 

Titanium sulfate 1 4 1 1 1 3 4 1 3 3 1 2 

Titanium tetrachloride 2 2 4 4 1 4 4 4 3 4 4 4 1 4 2 2 4 4 

Toluene (Toluol) 1 4 4 4 1 4 4 4 4 4 4 4 1 4 3 2 4 4 

Toluene di-isocyanide (TDI) 1 4 4 4 1 2 4 2 4 4 4 4 4 4 4 4 4 4 

Toluidine 1 4 1 4 4 3 2 2 4 

Transformer oil 1 1 4 2 1 4 1 4 1 2 1 4 1 1 1 1 4 2 

Transmission fluid, type A 1 1 4 2 1 4 1 4 1 1 1 4 1 1 1 1 2 2 

Triacetin 1 4 3 2 1 1 3 1 2 4 4 2 4 4 2 4 2 1 

Trialkyl phosphate 1 1 4 4 1 2 4 2 4 4 4 4 4 4 4 4 4 4 

Triaryl phosphate 1 1 4 4 1 1 4 2 4 4 4 4 1 4 4 2 4 3 

Tributoxyl ethyl phosphate 1 1 2 4 1 1 1 4 4 4 3 1 4 4 2 4 

Tributyl mercaptan 1 4 4 1 4 4 4 4 4 1 4 3 4 4 

Tributyl phosphate (TBP) 1 2 4 4 1 1 2 4 4 4 2 4 4 4 4 4 3 

Trichloroacetic acid (TCA) 1* 3 4 4 1 2 2 2 2 4 4 3 3 4 2 3 4 3 

Trichlorobenzene 1 4 4 1 4 4 4 2 4 

Trichloroethane 1 2 4 4 1 4 4 4 4 4 4 4 1 4 4 2 4 4 

Trichloroethylene 1 4 4 4 1 4 4 4 4 4 4 4 1 4 4 2 4 4 

Trichlorofluoromethane 1 4 4 3 1 4 3 4 2 4 4 4 2 2 2 4 4 

Trichloropropane 1 4 1 1 4 4 4 2 4 

Trichlorotrifluoroethane 1 4 2 1 1 3 1 4 1 4 2 3 2 3 4 1 4 

Tricresyl phosphate (TCP) 1 1 4 4 1 2 4 2 4 4 4 4 2 4 4 2 4 3 

Tridecyl alcohol (Tridecanol) 1 1 1 1 1 1 1 1 

Triethanol amine (TEA) 2 1 2 2 1 2 3 2 3 4 4 2 3 3 3 3 3 3 

Triethyl aluminium (ATE) 1 4 3 1 3 3 4 4 4 2 4 4 

Triethyl amine 1 3 3 1 4 4 4 3 3 3 4 2 4 3 3 3 4 

Triethyl borane 1 4 4 1 3 3 4 4 4 1 4 4 

Triethyl phosphate (TEP) 1 1 4 3 4 2 2 

45


1 = Excellent 

2 = Good 

3 = Doubtful 



PERLAST ® 

FEPM 

SBR 

CR 

FEP & PFA 

EPR & EPDM 

ECO 

IIR (Butyl) 

NBR (Nitrile) 

ACM 

AU & EU 



AEM 

HNBR 


CSM 




Triethylene glycol (TEG) 1 1 1 1 1 1 1 1 1 1 1 1 

Trifluoroacetic Acid (TFA) 1* 4 1 1 1 4 1 1 3 3 1 1 

Trifluoroethane 1 2 4 4 1 4 4 4 4 4 4 1 4 2 4 4 

Trimethylpentane (Iso-octane) 1 2 4 3 1 4 1 4 1 1 2 4 1 1 1 1 2 4 

Trinitrotoluene (TNT) 1 2 4 2 1 4 4 4 4 4 2 4 4 2 2 3 

Trioctyl phosphate 1 1 4 4 1 1 1 4 4 4 4 2 4 4 2 4 3 

Triolene (Olein) 1 4 4 1 4 2 3 2 4 4 2 3 4 

Triphenyl phosphite 1 1 4 4 1 1 4 4 4 3 4 

Tritolyl phosphate (Lindol) 1 1 4 4 1 1 4 1 4 4 4 4 2 4 4 3 4 3 

Tung oil 1 1 4 2 1 4 3 1 1 3 4 1 1 1 2 3 4 

Turbine oil 1 1 4 4 1 4 1 4 2 2 2 4 1 1 1 2 4 4 

Turpentine 1 2 4 4 1 4 1 4 1 2 4 4 1 3 1 2 4 4 

Type I fuel (Mil-S-3136) 1 3 4 2 1 4 1 4 1 2 1 4 1 1 1 1 2 4 

Type II fuel (Mil-S-3136) 1 4 4 1 4 1 4 2 4 2 4 1 2 4 4 

Type III fuel (Mil-S-3136) 1 4 4 4 1 4 2 4 1 4 2 4 1 3 1 1 4 4 

Unsymmetrical dimethylhydrazine 2 3 2 2 1 1 2 1 2 4 4 1 4 4 2 4 1 4 

Urea (Carbamide) 1 1 1 1 1 1 1 2 2 1 1 

Uric acid 1 4 1 1 4 4 1 1 2 

Valeric acid 1 4 1 1 1 4 1 1 

Varnish 1 2 4 4 1 4 4 2 4 3 4 1 4 2 2 4 4 

Vegetable oils & fats 1 1 4 3 1 3 1 3 1 1 2 4 1 2 1 1 2 2 

Vinegar 1 2 2 1 1 1 2 1 2 4 4 2 1 4 2 2 1 1 

Vinyl acetate 1 4 4 2 1 2 4 2 4 4 4 4 4 

Vinyl chloride (Chloroethylene) 1 2 4 4 1 3 4 3 4 4 4 4 1 4 4 2 4 4 

Vinyl cyanide (Acrylonitrile) 1 2 3 3 1 4 4 4 4 4 4 3 3 4 4 4 3 4 

Vinylbenzene (Styrene) 1 2 4 4 1 4 4 4 4 4 4 4 2 4 4 3 4 4 

Water, cold 1 1 1 2 1 1 2 1 1 4 4 1 1 3 1 1 1 1 

Water, hot 1 1 1 1 2 2 4 4 3 1 4 1 1 1 

Water, potable 1 1 1 1 1 

Whiskey & wines 1 1 1 1 1 4 4 1 1 4 1 1 1 

White oil 1 1 4 2 1 4 1 4 1 1 1 4 1 1 1 1 4 4 

White pine oil 1 1 4 4 1 4 4 2 4 1 2 1 4 4 

Wood alcohol (Methanol) 1 1 1 1 1 1 2 1 2 4 4 1 1 1 1 2 1 2 

Wood oil 1 1 4 2 1 4 3 1 1 3 4 1 1 1 2 3 4 

Xenon 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 

Xylene (Xylol) 1 3 4 4 1 4 4 4 4 4 4 4 1 4 4 1 4 4 

Xylidine (Xylidin) 1 1 4 4 1 4 4 4 3 4 4 4 4 4 3 4 4 4 

Zeolites 1 1 1 1 1 1 1 1 1 1 1 1 1 1 

Zinc acetate 1 3 3 2 1 1 3 1 3 4 4 2 4 4 2 4 4 4 

Zinc ammonium chloride 1 1 1 1 

Zinc carbonate 1 1 1 1 1 1 1 1 1 1 1 

Zinc chloride 1 1 1 1 1 1 2 1 1 4 4 1 1 3 1 1 1 1 

Zinc cyanide 1 1 1 1 3 1 1 

Zinc hydrosulfite 1 1 1 1 1 1 1 

Zinc nitrate 1 1 1 1 1 1 1 

46 

Zinc phosphate solution 1 1 1 1 1 1 1 1 

Zinc salts 1 1 1 1 1 1 1 1 4 1 1 1 1 1 1 1 

Zinc sulfate 1 1 2 1 1 1 2 1 1 4 4 2 1 3 1 1 1 1

Elastomer terminology 

This section explains the key terms used to define the properties of elastomers. 

Tensile Properties 

Simple testing of elastomer samples in tension 

is commonly used to define the strength of the 

materials. The most common representation is 

in the form of an engineering stress-strain 

curve; engineering stress-strain uses the 

original dimensions for calculations, as 

opposed to the actual dimensions during 

testing (the cross-section may not necessarily 

remain constant during testing). A typical 

engineering stress-strain curve from a tensile 

test is shown opposite. 

S 


σ = Engineering stress. 

ε = Engineering strain or elongation reported 

as a percentage of the original gauge length. 

Typical tensile stress-strain curves for elastomers 

S = Stress 

E = Elongation expressed as a percentage of the original gauge length (Strain) 

Tensile Stress (S or σ) 

The stress applied to extend the test piece, calculated as 

force per unit area of the original cross-section of the test 

length. Results are normally reported in MPa. 

Elongation (E or ε) 

The extension expressed 

as a percentage of the 

original test length, 

produced on the test 

piece by a tensile stress, 

this is known as percent 

strain. 

Tensile Strength (TS) 

The maximum tensile 

stress recorded in 

extending the test piece to 

breaking point. Also 

described as ‘ultimate 

tensile stress’. 

Tensile test piece 

Elongation at a given stress (ES) 

The tensile strain in the test length when the test piece is 

subjected to a given tensile stress. 

Modulus or “Stress at a given elongation” (SE) 

The tensile stress in the test length at a given elongation. This 

definition is widely referred to with the term ‘modulus’, and 

care should be taken to avoid confusion with other uses of the 

term modulus, such as Young’s Modulus, which denotes the 

slope of a linear stress-strain curve. Neither Young’s Modulus 

or Secant modulus are applicable to non-linear materials and 

are therefore not used when referring to elastomers. 

Strain Energy Density (W) 

Defined as the ‘work done’ for a given strain, i.e. the area 

under the stress-strain curve after a specified elongation. 

Tensile Strength at break (TS b ) 

The tensile stress recorded at the moment of 

rupture/sample failure. 

Note: the values of TS and TSb may be different if after yield, 

the elongation continues and is accompanied by a drop in 

stress, resulting in TSb being lower than TS. 

Elongation at break (E b ) 

The elongation (expressed as a percentage of the original 

length) at breaking point. 

47



Tear strength 

The median force required 

to propagate a cut in a 

specified trouser-shaped 

test piece by tearing, 

divided by the thickness of 

the test piece. 

This term indicates the resistance to propagation of small precut 

in an elastomer. The most common test uses the “Trouser 

Tear” method (ASTM D624, Die T), with the test sample 

having the shape described in the title. 

Friction, Wear and Abrasion 

The resistance to wear of a rubber when its surface is 

subjected to mechanical action. It is usually expressed as an 

abrasion resistance index referred to a standard rubber and is 

applicable to all methods. 

Friction 

Friction can be defined as the resistance to sliding of one 

material over another. Testing of friction with relation to 

elastomers is mainly associated with the tyre industry, and can 

be split into two separate categories: static and dynamic. 

Testing usually is performed using a ‘sled’ of material loaded 

with additional weights to produce a normal force. This sled is 

then slid over a surface of a known surface-finish. The 

resultant resistant force can be related back to the coefficient 

of friction (µ) using the formula F = µR, where F is the resistant 

force and R is the normal force. There are numerous 

drawbacks to this method, as elastomers do not fully comply 

with this equation, but data can be comparable. 

Abrasion resistance index 

The expression of abrasion resistance, being the ratio of the 

volume loss of a standard rubber to the volume loss of a 

rubber under test, determined under the same specified 

conditions, expressed as a percentage. 

Hardness 

The resistance of a material surface to 

penetration by an indentor of specified 

dimensions under specified load. The 

hardness property is quoted against 

two common systems (which do not 

necessarily correlate): 

IRHD – International Rubber 

Hardness Degrees 

Based on measuring the penetration of a specified rigid ball in a 

test specimen under a specified dead load. A scaled down 

version of this dead load instrument is available for conducting 

measurements on small cross sections and thicknesses IRHD `M`. 

For curved surfaces the ‘Apparent 

Hardness’ is often quoted, as IRHD and 

Shore A values tend to be more 

variable when measured across small 

curved surfaces, as is the 

case with O-rings. 

Shore hardness degrees – the testing 

equipment used to measure hardness 

are often referred to as durometers 

(type A or D), both utilise a calibrated 

spring to act on a specified indentor to 

penetrate the test specimen. 

The hardness scales are quoted in 

degrees from 0 (infinitely soft) to 100 

(bone hard). 

The test involves the removal of rubber using an abrasive cloth 

on a rotating cylinder. The volume loss of the test rubber is 

calculated from the same test conditions to remove 200mg of 

the appropriate standard rubber. 

48


Compressive Properties 

Compression set 

A measure of a material’s elasticity after prolonged action of 

compression, either under ambient conditions, or whilst being 

exposured to elevated temperatures. 

Two sections of the same 

O-ring. The section on the 

left displays compression 

set after being compressed 

at high temperature for a 

period of time. 

Compression set is often 

used as a measure of the 

state of cure or strength of 

crosslinking; it is quoted 

extensively for sealing 

applications as an attempt 

to relate material 

characteristics to leakage 

prevention, where recovery 

of the seal’s shape is 

required after distortion. 

Physical and chemical 

changes that can occur to 

an elastomer at elevated 

temperatures, may prevent 

the elastomer from fully 

recovering its original shape 

on removal of the applied 

compressive strain – the 

result is known as a ‘set’, 

and is quantified as a 

percentage loss in shape 

compared to the original 

dimensions. 

ASTM D395 defines two different test methods (A and B). 

Method A is not often stated, but relates to a constant load. 

Method B is the most common method where a sample of 

specific dimensions is compressed to a fixed deflection, after 

exposure to elevated temperatures, the sample is removed from 

the fixture and allowed to rest under ambient conditions before 

the final dimensions are measured. Another less commonly 

used variant of this test is found within ISO 815, where the 

samples can be allowed to cool while still under compression. 

Compressive stress relaxation 

Elastomers are viscoelastic materials which essentially behave 

both as an elastic solid and as a viscous liquid. Constant 

deformation of an elastomer can lead to internal structural 

changes, which in turn can alter the stress-strain 

characteristics of the material under load. 

When compressed, energy is both stored and dissipated by 

the material i.e. both both elastic and viscous effects occur. 

Therefore, as an elastomer is compressed, it will generate a 

reaction force (or ‘sealing force’). However, over time, the 

stored energy will decrease, reducing the initial sealing force. 

This decrease in sealing force is known as ‘Compressive 

Stress Relaxation’ (CSR). CSR is sometimes referred to as the 

retained sealing force in the seals and gaskets sector. 

The phenomenon can be accelerated by exposure to 

chemicals and/or elevated temperatures which attack the 

polymer backbone or cross-linking system. 

CSR is measured by compressing a standard test piece to a 

constant strain and measuring the force exerted by the test 

piece at specific intervals under specified conditions. The 

decaying force is expressed as a percentage of the initial 

counterforce. 

Compressive Modulus 

Compressive modulus is an important physical property of 

elastomers and determines the amount of stress a material will 

exhibit for a given amount of compressive strain. 

The testing is sometimes referred to as ‘load deflection’ testing. 

The results of the test are highly dependent upon sample 

dimensions, due to the ‘shape-factor’ effect when testing 

elastomers. The ‘shape-factor’ is a ratio of the area of the test 

sample, compared to the area of the sample that is ‘free-tobulge’; 

it is noted that a sample with a high surface area, but a 

low area free-to-bulge will show rapid increases in modulus. 

Permeation 

The permeation of gases or vapours through the elastomer. 

This is an important property if the elastomer is being used to 

prevent leakage of gases/vapours from chambers, etc. The 

permeation rate is governed by the type of elastomer used 

and the composition of the final compound (filler type, 

plasticisers, etc). The degree of permeation generally reduces 

from silicone elastomers (the highest), followed by NR, EPDM, 

SBR, CR, NBR, FKM and FFKM, ECO and IIR. 

Explosive Decompression 

Permeation of a gas into an elastomer under high pressure 

may not result in any long term effect provided the pressure is 

released gradually, allowing the gas to permeate out of the 

elastomer. However, if the pressure is released rapidly, the 

pressurised gas can expand suddenly, rupturing the elastomer 

in a catastrophic manner. Specific elastomer compounds are 

required to eliminate this effect, with the formulated materials 

tending to be very hard. See page 8 for information on 

Explosive Decompression testing. 


49


50 


Chemical properties 

All types of elastomers 

are susceptible to 

chemical attack of 

varying degrees. The 

compatibility of a 

rubber in a particular 

environment is a function 

of both the polymer 

structure, and the way in 

which it has been formulated. 

Chemical incompatibility can have various effects on the 

rubber compound, depending on the exact form of chemical 

attack, with the effects being exaggerated or accelerated at 

elevated temperatures. The physical effects can be seen as: 

- Embrittlement and hardening 

- Softening and becoming tacky 

- Swelling 

- Volume loss 

The O-ring on the right 

has swollen due to 

chemical incompatibility. 

The most common effect is swelling – either due to a solubility 

effect, or chemical attack, resulting in a change in the 

elastomer’s polarity. Though the volume increase may be 

reversible, the effects on the polymer may not be. 

Embrittlement and hardening are indicative of additional 

cross-linking, and softening is indicative of degradation of the 

polymer/crosslink network. Volume loss is most usually linked 

to extraction of plasticisers and process aids, resulting in a 

material that is less flexible. 

Heat resistance and accelerated ageing 

The controlled deterioration by air at elevated temperatures 

and atmospheric pressure after which physical 

properties are measured and compared with un-aged test 

pieces. Typical properties measured are changes 

in hardness, elongation at break, ultimate tensile stress, 

and stress at various strains. 

Heat resistance and accelerated ageing is also linked to 

‘outgassing’, where an elastomer, on initial exposure to 

elevated temperatures, may lose some process oils or lowmolecular 

weight fragments of the polymer. In some 

applications, this loss of polymeric species may interfere with 

critical components or processes. Typically, this weight loss 

can be measured using thermogravimetric analysis (TGA), 

often coupled to further equipment if the specific constituents 

of the weight loss need to be identified. 

Weathering, Ozone and UV resistance 

Exposure of elastomers to weathering can result in deterioration 

of the product due mainly to the effects of sunlight, in particular 

the UV (ultra-violet) component of the light spectrum. UV light 

has the effect of scission of the main polymer chain, leading to 

rapid degradation of the elastomer. This degradation manifests 

itself in the form of surface cracks often referred to as crazing 

and can allow ingress of water to leach out soluble components 

as well as leading to failure of the seal. This form of attack is 

most notable in materials that have unsaturation (carbon-carbon 

double-bonds) in the backbone of the polymer, and is 

accelerated by stressing the material (stress-induced chemical 

attack). To combat this, chemical UV stabilisers can be 

introduced into the formulation and carbon black is generally 

recognised as one of the most effective UV protection systems 

for use with elastomers. 

Similarly, Ozone (a powerful oxidising agent) can degrade 

elastomeric components in a similar manner to UV. Use of 

anti-ozonants and the careful choice of elastomers (saturated 

polymers) can significantly reduce/eliminate this problem. 

Low temperature resistance 

The low temperature resistance of any elastomer is dependent 

upon the material’s glass transition temperature (Tg). This 

is the temperature at which the elastomer changes from a 

rubber-like material to a brittle material. As an elastomer 

approaches its glass transition temperature, it would generally 

be expected that the tensile strength, hardness, modulus and 

compression set would all increase. The Tg for any given 

elastomer is mainly a function of the polymer structure, but 

can be altered slightly by the use of oils. 

Numerous methods exist for determining the cold temperature 

performance of an elastomer. Differential Scanning Calorimetry 

(DSC) is the most common method of evaluating the glass 

transition region itself. This method uses accurate 

measurements of enthalpy changes of materials over a given 

temperature range. Analysis of this data allows precise 

measurements of the glass transition. 

Other tests focus on more physical parameters. For example 

the temperature retraction (TR) test involves immersing a 

stretched, standard test piece in a bath at -70°C until it 

becomes rigid, then, allowing the sample to retract freely and 

raising the temperature at 1°C/min. The temperature at which 

the test piece has retracted 10% of the original stretch is 

referred to as ‘TR10’. A value appended to TR10 defines the 

initial stretch, eg. TR10/50 test will stretch the sample by 50%. 

An alternative method of describing the low temperature 

stiffness of an elastomer is to adopt the Gehman test (ISO 

1432 : 1998). This test method measures the torsional 

modulus of a standard test piece at a range of temperatures. 

The relative modulus values at the measured temperatures are 

determined (relative modulus at a given temperature is the 

ratio of the torsional modulus at that temperature to the 

torsional modulus at 23°C). The temperature at which the 

relative modulus is 10 is reported as T 10 or 5 as T 5 , etc. 

See ‘Thermal Analysis' on page 8 for details of DSC and TR 

testing services.



Peroxide or sulphur cure 

Several cross-linking (curing) mechanisms can be employed 

for the different elastomer types, common amongst these are 

sulphur-cured systems and peroxide-cured systems. In 

general sulphur-cured systems offer better original mechanical 

properties but worst heat ageing properties and peroxide 

systems vice-versa. 

Coefficient of thermal expansion 

All materials (except for a very small number of exceptions) 

expand with increasing temperature. The degree to which any 

material expands is characteristic of that material. The value is 

expressed in terms of the amount of linear or volumetric 

expansion that occurs with every unit of length or volume for 

every degree of temperature increase. 

Volume change 

The degree to which a material expands or contracts during 

exposure to operating environments is an important factor to 

consider in any sealing application. Operating fluids can be 

absorbed into a material causing it to swell. Operating fluids 

can also wash out ingredients within the material causing it 

to decrease in volume, sometimes both can happen; an 

initial swelling followed by shrinkage. Some high temperature 

and chemical environments can cause the cross-link 

structure to tighten causing a decrease in volume. 

Measurements of volume before and after exposure are 

expressed as a percent change. 

Out-gasing 

The release of gas from a material, or low molecular portions of 

the material. These gases, together with gases upon the surface 

of the solid, can be released into a vacuum environment to form 

a perceived leak. At ambient conditions the predominant outgased 

substances are water vapour and hydrocarbons. The 

rate of out-gasing increases at higher temperatures, which 

increases permeation rate and can initiate chemical reactions 

within the elastomer that release other gases. Out-gased 

substances can condense onto surfaces or react with process 

chemicals which may inhibit performance. 

Tolerances 

The amount of variation permitted on dimensions or surfaces 

during the manufacturing process. The tolerance is equal to 

the difference between the maximum and minimum limits of 

any specified dimension. As metals are hard and interference 

may prevent assembly, they are usually toleranced as a fit. 

Bores are defined as a dimension plus an allowable variation, 

and shafts are defined as a dimension minus an allowable 

variation. As elastomer parts, such as O-rings, are flexible and 

are typically designed to operate in interference (compression 

or tension), they are typically given a ± tolerance for diameter 

and cross section. 

O-ring tolerances for each standard size can be found in the 

O-ring size tables in section 12, page 57 of this publication. 

We recommend the use of ISO3302-1 Class M2, X2 in the 

design of custom elastomer components – see page 56. 

51

Hardware design 

Hardware design guidelines for O-rings 

An O-ring, or toroidal seal, is the most 

common type of seal used in the world 

today. Used to form a physical barrier to 

prevent the mixing of gases or liquid fluids, 

the simple toroidal shape of an O-ring has 

proven to offer high sealing efficiency 

across a wide range of applications. 

The sealing mechanism of an O-ring is a two stage process; 

compression and force. The initial compression (squeeze) 

upon the O-ring forms a physical barrier between the two 

fluids, forming the initial seal. It is therefore important to 

accurately control the amount of compression that the O-ring 

is subjected to. The elastomer acts like an incompressible 

viscous fluid with a very high surface tension. When acted 

upon by a differential pressure then the O-ring translates this 

into force acting upon and normal to the mating surface. 

It is this force that forms the high pressure capability of the 

O-ring. It is important that the pressure can energise the 

O-ring to form this secondary sealing mechanism and hence 

free-space must be left in the groove, taking into account 

tolerance stack-ups and differential thermal expansion. 

Four typical groove geometries (as shown in diagram below) 

are as follows:- 

• Piston seal 

• Rod seal 

• Face seal 

• Trapped seal 

Rod Seal Piston Seal Face Seal 

Trapped Seal 

To achieve installation, each of these seal types requires different levels of stretch. To achieve a good seal, the O-ring must be 

installed into suitable hardware to create a sealing system. Various international standards govern the specifications of such 

sealing systems: 

SAE AS568 O-ring sizes 

SAE AS4716 groove sizing for piston and rod seals 

British Standard BS1806 O-ring and groove sizing for imperial (British) nominal sizes 

British Standard BS4518 O-ring and groove sizing for metric nominal sizes 

52

Hardware design guidelines for O-rings 

For the standard O-ring sizes listed in this brochure 

we recommend their use in grooves as defined in 

the above AS and BS standards, up to the 

maximum operating temperature of the material. 

These standards are available from the relevant 

governing bodies; or by using the ‘Hardware 

Design Tool’ found in the ‘Technical’ section of 

our website; www.prepol.com. This online tool 

quickly identifies the best fit standard sized O-ring 

and provides groove dimensions for the most 

common AS and BS size seals used in plant 

equipment, specifically, rod seals, piston seals, 

face seals and trapped seals. It also provides a 

detailed technical drawing of the groove showing 

all dimensional measurements which can be 

printed off and included in other reports and 

drawings. For semiconductor applications, please 

refer to our semiconductor brochure for static 

groove sizing, as materials developed for this 

specific industry present different characteristics. 

Hardware design 

O-rings will operate successfully at high pressures, as 

shown below, above these pressures the shear 

stresses will overcome the capability of the material 

and cause pressure extrusion. In applications 

operating at high pressure, the use of back-up rings is 

common practice to prevent extrusion of the O-ring. 

Approximate extrusion pressure for a given diametral clearance 

Combinations of pressure 

and clearance that lie to 

the right of the pertinent 

line will result in 

extrusion of the seal. 

For non-standard sizes, 

high pressure applications 

or advice on custom high 

performance sealing 

systems please contact 

PPE’s technical 

department. 

53

O-ring tolerances 

O ring tolerances to ISO3601-1 ‘General Purpose’ 

I/Dia. Tol + / - I/Dia. Tol + / - I/Dia. Tol + / - I/Dia. Tol + / - I/Dia. Tol + / - 

2.80 0.13 53.00 0.50 145.00 1.13 268.00 1.92 433.00 2.99 

4.00 0.14 54.50 0.51 147.50 1.14 272.00 1.96 437.00 3.01 

5.30 0.15 56.00 0.52 150.00 1.16 276.00 1.98 443.00 3.05 

7.10 0.16 58.00 0.54 152.50 1.18 280.00 2.01 450.00 3.09 

8.50 0.17 60.00 0.55 155.00 1.19 283.00 2.03 456.00 3.13 

9.75 0.18 61.50 0.56 157.50 1.21 286.00 2.05 462.00 3.17 

10.60 0.19 63.00 0.57 160.00 1.23 290.00 2.08 466.00 3.19 

11.80 0.20 65.00 0.58 162.50 1.24 295.00 2.11 470.00 3.22 

13.20 0.21 67.00 0.60 165.00 1.26 300.00 2.14 475.00 3.25 

15.00 0.22 69.00 0.61 167.50 1.28 303.00 2.16 479.00 3.28 

16.00 0.23 71.00 0.63 170.00 1.29 307.00 2.19 483.00 3.30 

17.00 0.24 73.00 0.64 172.50 1.31 311.00 2.21 487.00 3.33 

19.00 0.25 75.00 0.65 175.00 1.33 315.00 2.24 493.00 3.36 

20.60 0.26 77.50 0.67 177.50 1.34 320.00 2.27 500.00 3.41 

21.20 0.27 80.00 0.69 180.00 1.36 325.00 2.30 508.00 3.46 

22.40 0.28 82.50 0.71 182.50 1.38 330.00 2.33 515.00 3.50 

23.60 0.29 85.00 0.72 185.00 1.39 335.00 2.36 523.00 3.55 

25.00 0.30 87.50 0.74 87.50 1.41 340.00 2.40 530.00 3.60 

26.50 0.31 90.00 0.76 190.00 1.43 345.00 2.43 538.00 3.65 

28.00 0.32 92.50 0.77 195.00 1.46 350.00 2.46 545.00 3.69 

29.00 0.33 95.00 0.79 200.00 1.49 355.00 2.49 553.00 3.74 

30.00 0.34 97.50 0.81 203.00 1.51 360.00 2.52 560.00 3.78 

31.50 0.35 100.00 0.82 206.00 1.53 365.00 2.56 570.00 3.85 

33.50 0.36 103.00 0.85 212.00 1.57 370.00 2.59 580.00 3.91 

34.50 0.37 106.00 0.87 218.00 1.61 375.00 2.62 590.00 3.97 

37.50 0.39 109.00 0.89 224.00 1.65 379.00 2.64 600.00 4.03 

38.70 0.40 112.00 0.91 227.00 1.67 383.00 2.67 608.00 4.08 

40.00 0.41 115.00 0.93 230.00 1.69 387.00 2.70 615.00 4.12 

41.20 0.42 118.00 0.95 236.00 1.73 391.00 2.72 623.00 4.17 

42.50 0.43 122.00 0.97 239.00 1.75 395.00 2.75 630.00 4.22 

45.00 0.44 125.00 0.99 243.00 1.77 400.00 2.78 640.00 4.28 

46.20 0.45 128.00 1.01 250.00 1.82 406.00 2.82 650.00 4.34 

47.50 0.46 132.00 1.04 254.00 1.84 412.00 2.85 660.00 4.40 

48.70 0.47 136.00 1.07 258.00 1.87 418.00 2.89 670.00 4.47 

50.00 0.48 140.00 1.09 261.00 1.89 425.00 2.93 

51.50 0.49 142.50 1.11 265.00 1.91 429.00 2.96 

To use: 

Descend I/Dia column to required size. Read-off the tolerance to the right of the size. 

If required size is not listed, go to the first size greater size and read-off the tolerance to the right. 

Example: O-Ring to be measured is 3.75. 

Descend I/Dia column to 4.00 (first size greater than 3.75) and read of tolerance to right, i.e. +/-0.14. 

54 

Notes: 

For sizes above 670.00, add/subtract 0.64% of the nominal diameter. 

Cross section tolerances for ISO3601-1 are detailed at the bottom of the following page.

O ring tolerances to ISO3601-1 ‘Aerospace Standard’ 

I/Dia. Tol + / - I/Dia. Tol + / - I/Dia. Tol + / - I/Dia. Tol + / - I/Dia. Tol + / - 

2.00 0.10 34.50 0.30 73.00 0.52 128.00 0.83 230.00 1.39 

3.75 0.11 36.50 0.31 75.00 0.53 132.00 0.85 236.00 1.42 

5.30 0.12 38.70 0.32 77.50 0.55 136.00 0.87 243.00 1.46 

6.90 0.13 40.00 0.33 80.00 0.56 140.00 0.89 250.00 1.49 

8.50 0.14 41.20 0.34 82.50 0.57 145.00 0.92 258.00 1.54 


10.00 0.15 43.70 0.35 85.00 0.59 150.00 0.95 265.00 1.57 

11.80 0.16 45.00 0.36 87.50 0.60 155.00 0.98 272.00 1.61 

13.20 0.17 47.50 0.37 90.00 0.62 160.00 1.00 280.00 1.65 

15.00 0.18 48.70 0.38 92.50 0.63 165.00 1.03 290.00 1.71 

16.00 0.19 50.00 0.39 95.00 0.64 170.00 1.06 300.00 1.76 

18.00 0.20 51.50 0.40 97.50 0.66 175.00 1.09 307.00 1.80 

20.00 0.21 53.00 0.41 100.00 0.67 180.00 1.11 315.00 1.84 

21.20 0.22 56.00 0.42 103.00 0.69 185.00 1.14 325.00 1.90 

22.40 0.23 58.00 0.44 106.00 0.71 190.00 1.17 335.00 1.95 

25.00 0.24 60.00 0.45 109.00 0.72 195.00 1.20 345.00 2.00 

26.50 0.25 63.00 0.46 112.00 0.74 200.00 1.22 355.00 2.05 

28.00 0.26 65.00 0.48 115.00 0.76 206.00 1.26 365.00 2.11 

30.00 0.27 67.00 0.49 118.00 0.77 212.00 1.29 375.00 2.16 

31.50 0.28 69.00 0.50 122.00 0.80 218.00 1.32 387.00 2.22 

33.50 0.29 71.00 0.51 125.00 0.81 224.00 1.35 400.00 2.29 

To use: 

Descend I/Dia column to required size. Read-off the tolerance to the right of the size. 

If required size is not listed, go to the first size greater size and read-off the tolerance to the right. 

Example: O-Ring to be measured is 17.00. 

Descend I/Dia column to 18.00 (first size greater than 17.00) and read of tolerance to right, i.e. +/-0.20. 

Notes: For sizes above 400.00, tolerance as per BS1806 (see pages 57-62). 

Cross section tolerances for ISO3601-1 are detailed below: 

Cross section tolerance table 

C/S above Tol + / - C/S above Tol + / - C/S above Tol + / - C/S above Tol + / - C/S above Tol + / - 

0.00 0.08 8.75 0.18 13.50 0.25 18.50 0.32 23.50 0.39 

2.62 0.09 9.25 0.19 14.25 0.26 19.25 0.33 24.25 0.40 

3.00 0.10 10.00 0.20 15.00 0.27 20.00 0.34 25.00 0.41 

3.55 0.12 10.75 0.21 15.75 0.28 20.75 0.35 25.75 0.42 

5.00 0.13 11.25 0.22 16.50 0.29 21.50 0.36 26.25 0.43 

5.70 0.14 12.00 0.23 17.25 0.30 22.25 0.37 27.00 0.44 

8.40 0.15 12.75 0.24 17.75 0.31 23.00 0.38 30.00 0.45 

55


Moulding tolerances according to ISO3302-1 (=BS3734-1) 

Classes 

The standard details four classes of mouldings and four classes for flash, adopted by PPE as follows:- 

Class M2, X2 = High quality mouldings with accurate flash. 

Dimensions 

The standard details two types of dimension, as follows:- 

F = Fixed dimensions 

The dimensions are not affected by deforming influences such as flash thickness or lateral displacement of different mould parts 

(upper and lower parts or cores). 

C = Closure dimensions 

These dimensions can be affected by variation in flash thickness or lateral displacement of different mould parts and therefore require 

greater tolerances that those of fixed dimensions. 

# = Dimension # 

Example of a height dimension that is not affected by flash thickness, therefore this is considered to be a ‘fixed’ dimension. 

Dimension # greater than 

Class M2,X2 

F + / - C + / - 

0.00 0.10 0.15 

4.00 0.15 0.20 

6.30 0.20 0.20 

10.00 0.20 0.25 

16.00 0.25 0.35 

25.00 0.35 0.40 

40.00 0.40 0.50 

63.00 0.50 0.70 

100.00 0.70 0.80 

160.00 0.5% 0.7% 

Flash (Height) max. 

0.50mm 

56

SAE AS568 American Standard O-ring sizes 

BS1806 British Standard O-ring sizes (imperial) 

BS4518 British Standard O-ring sizes (metric) 

Internal Diameter 

(mm) 


Tolerance +/- (mm) 

Cross Section 

Size Reference 

Le Joint Français 'R' O-ring sizes 

ISO3601 International Organisation for 

Standardisation O-ring sizes (General purpose) 


(mm) 



Cross Section 


O-ring sizes 

1.15 0.13 

1.00 

+/- 0.08 

R000 

0.74 0.10 

1.02 

+/- 0.08 

BS1806-001, AS568-001 

1.07 0.10 

1.27 

+/- 0.08 

BS1806-002, AS568-002 

4.70 0.13 

1.42 

+/- 0.08 

AS568-901, BSM48-901 

1.42 0.10 

1.53 

+/- 0.08 

BS1806-003, AS568-003 

2.20 0.13 R00 

3.10 0.15 BS4518 0031-16 

4.10 0.15 BS4518 0041-16 

5.10 0.15 BS4518 0051-16 

6.10 0.15 BS4518 0061-16 

7.10 0.15 BS4518 0071-16 

8.10 0.15 BS4518 0081-16 

9.10 0.15 BS4518 0091-16 

10.10 0.20 BS4518 0101-16 

11.10 0.20 BS4518 0111-16 

12.10 0.20 BS4518 0121-16 

13.10 0.20 BS4518 0131-16 

1.60 

14.10 0.20 +/- 0.08 BS4518 0141-16 

15.10 0.20 BS4518 0151-16 

16.10 0.20 BS4518 0161-16 

17.10 0.20 BS4518 0171-16 

18.10 0.25 BS4518 0181-16 

19.10 0.25 BS4518 0191-16 

22.10 0.25 BS4518 0221-16 

25.10 0.25 BS4518 0251-16 

27.10 0.25 BS4518 0271-16 

29.10 0.25 BS4518 0291-16 

32.10 0.30 BS4518 0321-16 

35.10 0.30 BS4518 0351-16 

37.10 0.30 BS4518 0371-16 

6.07 0.13 1.63 AS568-902, BSM48-902 

7.65 0.13 +/- 0.08 AS568-903, BSM48-903 

1.78 0.13 BS1806-004, AS568-004 

2.57 0.13 BS1806-005, AS568-005 

2.90 0.13 BS1806-006, AS568-006 

3.69 0.13 BS1806-007, AS568-007 

4.47 0.13 BS1806-008, AS568-008 

5.28 0.13 BS1806-009, AS568-009 

6.07 0.13 BS1806-010, AS568-010 

7.66 0.13 BS1806-011, AS568-011 

9.25 0.13 BS1806-012, AS568-012 

10.82 0.13 BS1806-013, AS568-013 

12.42 0.13 BS1806-014, AS568-014 

14.00 0.18 BS1806-015, AS568-015 

15.60 0.23 BS1806-016, AS568-016 

1.78 

17.16 0.23 BS1806-017, AS568-017 

+/- 0.08 

18.77 0.23 BS1806-018, AS568-018 

20.35 0.23 BS1806-019, AS568-019 

21.95 0.23 BS1806-020, AS568-020 

23.52 0.23 BS1806-021, AS568-021 

25.12 0.25 BS1806-022, AS568-022 

26.70 0.25 BS1806-023, AS568-023 

28.30 0.25 BS1806-024, AS568-024 

29.87 0.28 BS1806-025, AS568-025 

31.47 0.28 BS1806-026, AS568-026 

33.05 0.28 BS1806-027, AS568-027 

34.65 0.33 BS1806-028, AS568-028 

37.82 0.33 BS1806-029, AS568-029 

41.00 0.33 BS1806-030, AS568-030 

44.17 0.38 BS1806-031, AS568-031 

47.37 0.38 BS1806-032, AS568-032 

50.52 0.46 BS1806-033, AS568-033 

53.67 0.46 BS1806-034, AS568-034 

56.87 0.46 BS1806-035, AS568-035 

60.04 0.46 BS1806-036, AS568-036 

63.22 0.46 BS1806-037, AS568-037 

66.40 0.51 BS1806-038, AS568-038 

69.57 0.51 BS1806-039, AS568-039 

72.76 0.51 1.78 BS1806-040, AS568-040 

75.92 0.61 +/- 0.08 BS1806-041, AS568-041 

82.27 0.61 BS1806-042, AS568-042 

88.62 0.61 BS1806-043, AS568-043 

94.97 0.69 BS1806-044, AS568-044 

101.32 0.69 BS1806-045, AS568-045 

107.67 0.76 BS1806-046, AS568-046 

114.02 0.76 BS1806-047, AS568-047 

120.37 0.76 BS1806-048, AS568-048 

126.72 0.94 BS1806-049, AS568-049 

133.07 0.94 BS1806-050, AS568-050 

1.80 0.13 ISO3601-G 

2.00 0.13 ISO3601-G 

2.24 0.13 ISO3601-G 

2.50 0.13 ISO3601-G 

2.80 0.13 ISO3601-G 

3.15 0.14 ISO3601-G 

3.55 0.14 ISO3601-G 

3.75 0.14 ISO3601-G 

4.00 0.14 ISO3601-G 

4.50 0.15 ISO3601-G 

4.87 0.15 ISO3601-G 

5.00 0.15 ISO3601-G 

5.15 0.15 ISO3601-G 

5.30 0.15 ISO3601-G 

5.60 0.16 ISO3601-G 

6.00 0.16 ISO3601-G 

6.30 0.16 ISO3601-G 

6.70 0.16 ISO3601-G 

6.90 0.16 ISO3601-G 

7.10 0.16 ISO3601-G 

7.50 0.17 ISO3601-G 

8.00 0.17 ISO3601-G 

8.50 0.17 1.80 ISO3601-G 

8.75 0.18 +/- 0.08 ISO3601-G 

9.00 0.18 ISO3601-G 

9.50 0.18 ISO3601-G 

9.75 0.18 ISO3601-G 

10.00 0.19 ISO3601-G 

10.60 0.19 ISO3601-G 

11.20 0.20 ISO3601-G 

11.60 0.20 ISO3601-G 

11.80 0.19 ISO3601-G 

12.10 0.21 ISO3601-G 

12.50 0.21 ISO3601-G 

12.80 0.21 ISO3601-G 

13.20 0.21 ISO3601-G 

14.00 0.22 ISO3601-G 

14.50 0.22 ISO3601-G 

15.00 0.22 ISO3601-G 

15.50 0.23 ISO3601-G 

16.00 0.23 ISO3601-G 

17.00 0.24 ISO3601-G 

18.00 0.25 ISO3601-G 

19.00 0.25 ISO3601-G 

20.00 0.26 ISO3601-G 

20.60 0.26 ISO3601-G 

57







O-ring sizes 


(mm) 



Cross Section 



(mm) 



Cross Section 


58 

21.20 0.27 ISO3601-G 

22.40 0.28 ISO3601-G 

23.00 0.29 ISO3601-G 

23.60 0.29 ISO3601-G 

24.30 0.30 ISO3601-G 

25.00 0.30 1.80 ISO3601-G 

25.80 0.31 +/- 0.08 ISO3601-G 

26.50 0.31 ISO3601-G 

27.30 0.32 ISO3601-G 

28.00 0.32 ISO3601-G 

29.00 0.33 ISO3601-G 

30.00 0.34 ISO3601-G 

8.92 0.13 1.83 AS568-904, BSM48-904 

10.52 0.13 +/- 0.08 AS568-905, BSM48-905 

2.40 0.13 R0 

2.60 0.13 R1 

3.40 0.14 R2 

4.20 0.15 1.90 R3 

4.90 0.15 +/- 0.08 R4 

5.70 0.16 R5 

7.20 0.17 R6 

8.90 0.18 R7 

11.89 0.13 

1.98 

+/- 0.08 

AS568-906, BSM48-906 

13.46 0.18 

2.08 

+/- 0.08 

AS568-907, BSM48-907 

16.36 0.23 

2.21 

+/- 0.08 

AS568-908, BSM48-908 

3.60 0.15 BS4518 0036-24 

4.60 0.15 BS4518 0046-24 

5.60 0.15 BS4518 0056-24 

6.60 0.15 BS4518 0066-24 

7.60 0.15 BS4518 0076-24 

8.60 0.15 BS4518 0086-24 

9.60 0.15 BS4518 0096-24 

10.60 0.20 BS4518 0106-24 

11.60 0.20 BS4518 0116-24 

12.60 0.20 BS4518 0126-24 

13.60 0.20 BS4518 0136-24 

14.60 0.20 BS4518 0146-24 

15.60 0.20 BS4518 0156-24 

16.60 0.20 BS4518 0166-24 

17.60 0.20 BS4518 0176-24 

18.60 0.25 BS4518 0186-24 

19.60 0.25 BS4518 0196-24 

20.60 0.25 2.40 BS4518 0206-24 

21.60 0.25 +/- 0.08 BS4518 0216-24 

24.60 0.25 BS4518 0246-24 

27.60 0.25 BS4518 0276-24 

29.60 0.25 BS4518 0296-24 

31.60 0.30 BS4518 0316-24 

34.60 0.30 BS4518 0346-24 

35.60 0.30 BS4518 0356-24 

37.60 0.30 BS4518 0376-24 

39.60 0.30 BS4518 0396-24 

41.60 0.30 BS4518 0416-24 

44.60 0.30 BS4518 0446-24 

45.60 0.30 BS4518 0456-24 

47.60 0.30 BS4518 0476-24 

49.60 0.30 BS4518 0496-24 

51.60 0.40 BS4518 0516-24 

54.60 0.40 BS4518 0546-24 

55.60 0.40 BS4518 0556-24 

57.60 0.40 BS4518 0576-24 

58.60 0.40 BS4518 0586-24 

59.60 0.40 BS4518 0596-24 

61.60 0.40 BS4518 0616-24 

62.60 0.40 2.40 BS4518 0626-24 

+/- 0.08 

64.60 0.40 BS4518 0646-24 

67.60 0.40 BS4518 0676-24 

69.60 0.40 BS4518 0696-24 

17.93 0.23 2.46 AS568-909, BSM48-909 

19.18 0.23 +/- 0.08 AS568-910, BSM48-910 

1.24 0.10 BS1806-102, AS568-102 

2.06 0.13 BS1806-103, AS568-103 

2.84 0.13 BS1806-104, AS568-104 

3.63 0.13 BS1806-105, AS568-105 

4.42 0.13 BS1806-106, AS568-106 

5.23 0.13 BS1806-107, AS568-107 

6.02 0.13 BS1806-108, AS568-108 

7.59 0.13 BS1806-109, AS568-109 

9.19 0.13 BS1806-110, AS568-110 

10.77 0.13 BS1806-111, AS568-111 

12.37 0.13 BS1806-112, AS568-112 

13.94 0.18 BS1806-113, AS568-113 

15.54 0.23 BS1806-114, AS568-114 

17.12 0.23 BS1806-115, AS568-115 

18.72 0.23 BS1806-116, AS568-116 

20.29 0.25 BS1806-117, AS568-117 

21.89 0.25 BS1806-118, AS568-118 

23.47 0.25 BS1806-119, AS568-119 

25.07 0.25 BS1806-120, AS568-120 

26.64 0.25 BS1806-121, AS568-121 

28.24 0.25 BS1806-122, AS568-122 

29.82 0.30 BS1806-123, AS568-123 

31.42 0.30 BS1806-124, AS568-124 

32.99 0.30 BS1806-125, AS568-125 

34.59 0.30 BS1806-126, AS568-126 

36.17 0.30 BS1806-127, AS568-127 

37.77 0.30 BS1806-128, AS568-128 

39.34 0.38 BS1806-129, AS568-129 

2.62 

40.94 0.38 

+/- 0.08 

BS1806-130, AS568-130 

42.52 0.38 BS1806-131, AS568-131 

44.12 0.38 BS1806-132, AS568-132 

45.69 0.38 BS1806-133, AS568-133 

47.29 0.43 BS1806-134, AS568-134 

48.90 0.43 BS1806-135, AS568-135 

50.47 0.43 BS1806-136, AS568-136 

52.07 0.43 BS1806-137, AS568-137 

53.64 0.43 BS1806-138, AS568-138 

55.25 0.43 BS1806-139, AS568-139 

56.82 0.43 BS1806-140, AS568-140 

58.42 0.51 BS1806-141, AS568-141 

59.99 0.51 BS1806-142, AS568-142 

61.60 0.51 BS1806-143, AS568-143 

63.17 0.51 BS1806-144, AS568-144 

64.77 0.51 BS1806-145, AS568-145 

66.34 0.51 BS1806-146, AS568-146 

67.95 0.56 BS1806-147, AS568-147 

69.52 0.56 BS1806-148, AS568-148 

71.12 0.56 BS1806-149, AS568-149 

72.69 0.56 BS1806-150, AS568-150 

75.87 0.61 BS1806-151, AS568-151 

82.22 0.61 BS1806-152, AS568-152 

88.57 0.61 BS1806-153, AS568-153 

94.92 0.71 BS1806-154, AS568-154 

101.27 0.71 BS1806-155, AS568-155 

107.62 0.76 BS1806-156, AS568-156 

113.97 0.76 BS1806-157, AS568-157 

120.32 0.76 BS1806-158, AS568-158





(mm) 



Cross Section 






(mm) 



Cross Section 


O-ring sizes 

126.67 0.89 BS1806-159, AS568-159 

133.02 0.89 BS1806-160, AS568-160 

139.37 0.89 BS1806-161, AS568-161 

145.72 0.89 BS1806-162, AS568-162 

152.07 0.89 BS1806-163, AS568-163 

158.42 1.02 BS1806-164, AS568-164 

164.77 1.02 BS1806-165, AS568-165 

171.12 1.02 BS1806-166, AS568-166 

177.47 1.02 BS1806-167, AS568-167 

183.82 1.14 2.62 BS1806-168, AS568-168 

190.17 1.14 +/- 0.08 BS1806-169, AS568-169 

196.52 1.14 BS1806-170, AS568-170 

202.87 1.14 BS1806-171, AS568-171 

209.22 1.27 BS1806-172, AS568-172 

215.57 1.27 BS1806-173, AS568-173 

221.92 1.27 BS1806-174, AS568-174 

228.27 1.27 BS1806-175, AS568-175 

234.62 1.40 BS1806-176, AS568-176 

240.97 1.40 BS1806-177, AS568-177 

247.32 1.40 BS1806-178, AS568-178 

14.00 0.22 ISO3601-G 

14.50 0.22 ISO3601-G 

15.00 0.22 ISO3601-G 

15.50 0.23 ISO3601-G 

16.00 0.23 ISO3601-G 

17.00 0.24 ISO3601-G 

18.00 0.25 ISO3601-G 

19.00 0.25 ISO3601-G 

20.00 0.26 ISO3601-G 

20.60 0.26 ISO3601-G 

21.20 0.27 ISO3601-G 

22.40 0.28 ISO3601-G 

23.00 0.29 ISO3601-G 

23.60 0.29 ISO3601-G 

24.30 0.30 ISO3601-G 

25.00 0.30 ISO3601-G 

25.80 0.31 ISO3601-G 

26.50 0.31 ISO3601-G 

27.30 0.32 ISO3601-G 

28.00 0.32 ISO3601-G 

29.00 0.33 ISO3601-G 

30.00 0.34 ISO3601-G 

31.50 0.35 ISO3601-G 

2.65 

32.50 0.36 ISO3601-G 

+/- 0.09 

33.50 0.36 ISO3601-G 

34.50 0.37 ISO3601-G 

35.50 0.38 ISO3601-G 

36.50 0.38 ISO3601-G 

37.50 0.39 ISO3601-G 

38.70 0.40 ISO3601-G 

40.00 0.41 ISO3601-G 

41.20 0.42 ISO3601-G 

42.50 0.43 ISO3601-G 

43.70 0.44 ISO3601-G 

45.00 0.44 ISO3601-G 

46.20 0.45 ISO3601-G 

47.50 0.46 ISO3601-G 

48.70 0.47 ISO3601-G 

50.00 0.48 ISO3601-G 

51.50 0.49 ISO3601-G 

53.00 0.50 ISO3601-G 

54.50 0.51 ISO3601-G 

56.00 0.52 ISO3601-G 

58.00 0.54 ISO3601-G 

60.00 0.55 ISO3601-G 

61.50 0.56 ISO3601-G 

63.00 0.57 ISO3601-G 

65.00 0.58 ISO3601-G 

67.00 0.60 ISO3601-G 

69.00 0.61 ISO3601-G 

71.00 0.63 ISO3601-G 

73.00 0.64 ISO3601-G 

75.00 0.65 ISO3601-G 

77.50 0.67 ISO3601-G 

80.00 0.69 ISO3601-G 

82.50 0.71 2.65 ISO3601-G 

85.00 0.72 +/- 0.09 ISO3601-G 

87.50 0.74 ISO3601-G 

90.00 0.76 ISO3601-G 

92.50 0.77 ISO3601-G 

95.00 0.79 ISO3601-G 

97.50 0.81 ISO3601-G 

100.00 0.82 ISO3601-G 

103.00 0.85 ISO3601-G 

106.00 0.87 ISO3601-G 

8.90 0.18 R8 

10.50 0.19 R9 

12.10 0.21 R10 

13.60 0.22 

2.70 

R11 

+/- 0.09 

15.10 0.23 R12 

16.90 0.24 R13 

18.40 0.25 R14 

21.92 0.23 AS568-911, BSM48-911 

23.47 0.23 AS568-912, BSM48-912 

25.04 0.25 2.95 AS568-913, BSM48-913 

26.59 0.25 +/- 0.10 AS568-914, BSM48-914 

29.74 0.25 AS568-916, BSM48-916 

34.42 0.30 AS568-918, BSM48-918 

19.50 0.25 BS4518 0195-30 

21.50 0.25 BS4518 0215-30 

22.50 0.25 BS4518 0225-30 

24.50 0.25 BS4518 0245-30 

25.50 0.25 BS4518 0255-30 

26.50 0.25 BS4518 0265-30 

27.50 0.25 BS4518 0275-30 

29.50 0.25 BS4518 0295-30 

31.50 0.30 BS4518 0315-30 

32.50 0.30 BS4518 0325-30 

34.50 0.30 BS4518 0345-30 

35.50 0.30 BS4518 0355-30 

36.50 0.30 BS4518 0365-30 

37.47 0.36 AS568-920, BSM48-920 

37.50 0.30 BS4518 0375-30 

39.50 0.30 BS4518 0395-30 

41.50 0.30 3.00 BS4518 0415-30 

42.50 0.30 +/- 0.10 BS4518 0425-30 

43.69 0.36 AS568-924, BSM48-924 

44.50 0.30 BS4518 0445-30 

49.50 0.30 BS4518 0495-30 

53.09 0.46 AS568-928, BSM48-928 

54.50 0.40 BS4518 0545-30 

55.50 0.40 BS4518 0555-30 

57.50 0.40 BS4518 0575-30 

59.36 0.46 AS568-932, BSM48-932 

59.50 0.40 BS4518 0595-30 

62.50 0.40 BS4518 0625-30 

64.50 0.40 BS4518 0645-30 

69.50 0.40 BS4518 0695-30 

74.50 0.40 BS4518 0745-30 

79.50 0.40 BS4518 0795-30 

84.50 0.50 BS4518 0845-30 

89.50 0.50 BS4518 0895-30 

59

O-ring sizes 





(mm) 



Cross Section 






(mm) 



Cross Section 


60 

94.50 0.50 BS4518 0945-30 

99.50 0.50 BS4518 0995-30 

104.50 0.50 BS4518 1045-30 

109.50 0.50 BS4518 1095-30 

114.50 0.50 BS4518 1145-30 

119.50 0.50 BS4518 1195-30 

124.50 0.60 BS4518 1245-30 

129.50 0.60 BS4518 1295-30 

134.50 0.60 BS4518 1345-30 

139.50 0.60 BS4518 1395-30 

144.50 0.60 BS4518 1445-30 

149.50 0.60 BS4518 1495-30 

154.50 0.60 BS4518 1545-30 

159.50 0.60 3.00 BS4518 1595-30 

164.50 0.60 +/- 0.10 BS4518 1645-30 

169.50 0.60 BS4518 1695-30 

174.50 0.60 BS4518 1745-30 

179.50 0.60 BS4518 1795-30 

184.50 0.80 BS4518 1845-30 

189.50 0.80 BS4518 1895-30 

194.50 0.80 BS4518 1945-30 

199.50 0.80 BS4518 1995-30 

209.50 0.80 BS4518 2095-30 

219.50 0.80 BS4518 2195-30 

229.50 0.80 BS4518 2295-30 

239.50 0.80 BS4518 2395-30 

244.50 0.80 BS4518 2445-30 

249.50 0.80 BS4518 2495-30 

4.34 0.13 BS1806-201, AS568-201 

5.94 0.13 BS1806-202, AS568-202 

7.52 0.13 BS1806-203, AS568-203 

9.12 0.13 BS1806-204, AS568-204 

10.69 0.13 BS1806-205, AS568-205 

12.29 0.13 BS1806-206, AS568-206 

13.87 0.18 BS1806-207, AS568-207 

15.47 0.23 BS1806-208, AS568-208 

17.04 0.23 BS1806-209, AS568-209 

18.64 0.25 BS1806-210, AS568-210 

20.22 0.25 BS1806-211, AS568-211 

21.82 0.25 BS1806-212, AS568-212 

23.39 0.25 BS1806-213, AS568-213 

24.99 0.25 BS1806-214, AS568-214 

26.57 0.25 BS1806-215, AS568-215 

28.17 0.30 BS1806-216, AS568-216 

29.74 0.30 BS1806-217, AS568-217 

31.34 0.30 BS1806-218, AS568-218 

32.92 0.30 BS1806-219, AS568-219 

3.53 

34.52 0.30 BS1806-220, AS568-220 

+/- 0.10 

36.09 0.30 BS1806-221, AS568-221 

37.69 0.38 BS1806-222, AS568-222 

40.87 0.38 BS1806-223, AS568-223 

44.04 0.38 BS1806-224, AS568-224 

47.22 0.46 BS1806-225, AS568-225 

50.39 0.46 BS1806-226, AS568-226 

53.57 0.46 BS1806-227, AS568-227 

56.74 0.51 BS1806-228, AS568-228 

59.92 0.51 BS1806-229, AS568-229 

63.09 0.51 BS1806-230, AS568-230 

66.27 0.51 BS1806-231, AS568-231 

69.44 0.61 BS1806-232, AS568-232 

72.62 0.61 BS1806-233, AS568-233 

75.79 0.61 BS1806-234, AS568-234 

78.97 0.61 BS1806-235, AS568-235 

82.14 0.61 BS1806-236, AS568-236 

85.32 0.61 BS1806-237, AS568-237 

88.49 0.61 BS1806-238, AS568-238 

91.67 0.71 BS1806-239, AS568-239 

94.84 0.71 BS1806-240, AS568-240 

98.02 0.71 BS1806-241, AS568-241 

101.19 0.71 BS1806-242, AS568-242 

104.37 0.71 BS1806-243, AS568-243 

107.54 0.76 BS1806-244, AS568-244 

110.72 0.76 BS1806-245, AS568-245 

113.89 0.76 BS1806-246, AS568-246 

117.07 0.76 BS1806-247, AS568-247 

120.24 0.76 BS1806-248, AS568-248 

123.42 0.89 BS1806-249, AS568-249 

126.59 0.89 BS1806-250, AS568-250 

129.77 0.89 BS1806-251, AS568-251 

132.94 0.89 BS1806-252, AS568-252 

136.12 0.89 BS1806-253, AS568-253 

139.29 0.89 BS1806-254, AS568-254 

142.47 0.89 BS1806-255, AS568-255 

145.64 0.89 BS1806-256, AS568-256 

148.82 0.89 BS1806-257, AS568-257 

151.99 0.89 BS1806-258, AS568-258 

158.34 1.02 BS1806-259, AS568-259 

164.69 1.02 BS1806-260, AS568-260 

171.04 1.02 BS1806-261, AS568-261 

177.39 1.02 

3.53 

BS1806-262, AS568-262 

+/- 0.10 

183.74 1.14 BS1806-263, AS568-263 

190.09 1.14 BS1806-264, AS568-264 

196.44 1.14 BS1806-265, AS568-265 

202.79 1.14 BS1806-266, AS568-266 

209.14 1.27 BS1806-267, AS568-267 

215.49 1.27 BS1806-268, AS568-268 

221.84 1.27 BS1806-269, AS568-269 

228.19 1.27 BS1806-270, AS568-270 

234.54 1.40 BS1806-271, AS568-271 

240.89 1.40 BS1806-272, AS568-272 

247.24 1.40 BS1806-273, AS568-273 

253.59 1.40 BS1806-274, AS568-274 

266.29 1.40 BS1806-275, AS568-275 

278.99 1.65 BS1806-276, AS568-276 

291.69 1.65 BS1806-277, AS568-277 

304.39 1.65 BS1806-278, AS568-278 

329.79 1.65 BS1806-279, AS568-279 

355.19 1.65 BS1806-280, AS568-280 

380.57 1.65 BS1806-281, AS568-281 

405.26 1.91 BS1806-282, AS568-282 

430.66 2.03 BS1806-283, AS568-283 

456.06 2.16 BS1806-284, AS568-284 

18.00 0.25 ISO3601-G 

19.00 0.25 ISO3601-G 

20.00 0.26 ISO3601-G 

20.60 0.26 ISO3601-G 

21.20 0.27 ISO3601-G 

22.40 0.28 ISO3601-G 

23.00 0.29 ISO3601-G 

23.60 0.29 ISO3601-G 

24.30 0.30 ISO3601-G 

25.00 0.30 ISO3601-G 

25.80 0.31 3.55 ISO3601-G 

26.50 0.31 +/- 0.10 ISO3601-G 

27.30 0.32 ISO3601-G 

28.00 0.32 ISO3601-G 

29.00 0.33 ISO3601-G 

30.00 0.34 ISO3601-G 

31.50 0.35 ISO3601-G 

32.50 0.36 ISO3601-G 

33.50 0.36 ISO3601-G 

34.50 0.37 ISO3601-G 

35.50 0.38 ISO3601-G 

36.50 0.38 ISO3601-G





(mm) 



Cross Section 






(mm) 



Cross Section 


O-ring sizes 

37.50 0.39 ISO3601-G 

38.70 0.40 ISO3601-G 

40.00 0.41 ISO3601-G 

41.20 0.42 ISO3601-G 

42.50 0.43 ISO3601-G 

43.70 0.44 ISO3601-G 

45.00 0.44 ISO3601-G 

46.20 0.45 ISO3601-G 

47.50 0.46 ISO3601-G 

48.70 0.47 ISO3601-G 

50.00 0.48 ISO3601-G 

51.50 0.49 ISO3601-G 

53.00 0.50 ISO3601-G 

54.50 0.51 ISO3601-G 

56.00 0.52 ISO3601-G 

58.00 0.54 ISO3601-G 

60.00 0.55 ISO3601-G 

61.50 0.56 ISO3601-G 

63.00 0.57 ISO3601-G 

65.00 0.58 ISO3601-G 

67.00 0.60 ISO3601-G 

69.00 0.61 ISO3601-G 

71.00 0.63 ISO3601-G 

73.00 0.64 ISO3601-G 

75.00 0.65 ISO3601-G 

77.50 0.67 ISO3601-G 

80.00 0.69 ISO3601-G 

82.50 0.71 ISO3601-G 

85.00 0.72 ISO3601-G 

87.50 0.74 ISO3601-G 

90.00 0.76 ISO3601-G 

92.50 0.77 ISO3601-G 

95.00 0.79 ISO3601-G 

97.50 0.81 ISO3601-G 

3.55 

100.00 0.82 ISO3601-G 

+/- 0.10 

103.00 0.85 ISO3601-G 

106.00 0.87 ISO3601-G 

109.00 0.89 ISO3601-G 

112.00 0.91 ISO3601-G 

115.00 0.93 ISO3601-G 

118.00 0.95 ISO3601-G 

122.00 0.97 ISO3601-G 

125.00 0.99 ISO3601-G 

128.00 1.01 ISO3601-G 

132.00 1.04 ISO3601-G 

136.00 1.07 ISO3601-G 

140.00 1.09 ISO3601-G 

142.50 1.11 ISO3601-G 

145.00 1.13 ISO3601-G 

147.50 1.14 ISO3601-G 

150.00 1.16 ISO3601-G 

152.50 1.18 ISO3601-G 

155.00 1.19 ISO3601-G 

157.50 1.21 ISO3601-G 

160.00 1.23 ISO3601-G 

162.50 1.24 ISO3601-G 

165.00 1.26 ISO3601-G 

167.50 1.28 ISO3601-G 

170.00 1.29 ISO3601-G 

172.50 1.31 ISO3601-G 

175.00 1.33 ISO3601-G 

177.50 1.34 ISO3601-G 

180.00 1.36 ISO3601-G 

182.50 1.38 ISO3601-G 

185.00 1.39 ISO3601-G 

187.50 1.41 ISO3601-G 

190.00 1.43 ISO3601-G 

195.00 1.46 ISO3601-G 

200.00 1.49 ISO3601-G 

18.30 0.25 R15 

19.80 0.26 R16 

21.30 0.28 R17 

23.00 0.29 R18 

24.60 0.30 R19 

26.20 0.31 R20 

27.80 0.32 

3.60 

R21 

+/- 0.10 

29.30 0.34 R22 

30.80 0.35 R23 

32.50 0.36 R24 

34.10 0.37 R25 

35.60 0.39 R26 

37.30 0.39 R27 

40.00 0.41 ISO3601-G 

41.20 0.42 ISO3601-G 

42.50 0.43 ISO3601-G 

43.70 0.44 ISO3601-G 

45.00 0.44 ISO3601-G 

46.20 0.45 ISO3601-G 

47.50 0.46 ISO3601-G 

48.70 0.47 ISO3601-G 

50.00 0.48 ISO3601-G 

51.50 0.49 ISO3601-G 

53.00 0.50 ISO3601-G 

54.50 0.51 ISO3601-G 

56.00 0.52 ISO3601-G 

58.00 0.54 ISO3601-G 

60.00 0.55 ISO3601-G 

61.50 0.56 ISO3601-G 

63.00 0.57 ISO3601-G 

65.00 0.58 ISO3601-G 

67.00 0.60 ISO3601-G 

69.00 0.61 ISO3601-G 

71.00 0.63 ISO3601-G 

73.00 0.64 ISO3601-G 

75.00 0.65 ISO3601-G 

77.50 0.67 ISO3601-G 

80.00 0.69 ISO3601-G 

82.50 0.71 ISO3601-G 

85.00 0.72 5.30 ISO3601-G 

87.50 0.74 +/- 0.13 ISO3601-G 

90.00 0.76 ISO3601-G 

92.50 0.77 ISO3601-G 

95.00 0.79 ISO3601-G 

97.50 0.81 ISO3601-G 

100.00 0.82 ISO3601-G 

103.00 0.85 ISO3601-G 

106.00 0.87 ISO3601-G 

109.00 0.89 ISO3601-G 

112.00 0.91 ISO3601-G 

115.00 0.93 ISO3601-G 

118.00 0.95 ISO3601-G 

122.00 0.97 ISO3601-G 

125.00 0.99 ISO3601-G 

128.00 1.01 ISO3601-G 

132.00 1.04 ISO3601-G 

136.00 1.07 ISO3601-G 

140.00 1.09 ISO3601-G 

142.50 1.11 ISO3601-G 

145.00 1.13 ISO3601-G 

147.50 1.14 ISO3601-G 

150.00 1.16 ISO3601-G 

152.50 1.18 ISO3601-G 

155.00 1.19 ISO3601-G 

157.50 1.21 ISO3601-G 

160.00 1.23 ISO3601-G 

162.50 1.24 ISO3601-G 

61







O-ring sizes 


(mm) 



Cross Section 



(mm) 



Cross Section 


62 

165.00 1.26 ISO3601-G 

167.50 1.28 ISO3601-G 

170.00 1.29 ISO3601-G 

172.50 1.31 ISO3601-G 

175.00 1.33 ISO3601-G 

177.50 1.34 ISO3601-G 

180.00 1.36 ISO3601-G 

182.50 1.38 ISO3601-G 

185.00 1.39 ISO3601-G 

187.50 1.41 ISO3601-G 

190.00 1.43 ISO3601-G 

195.00 1.46 ISO3601-G 

200.00 1.49 ISO3601-G 

203.00 1.51 ISO3601-G 

206.00 1.53 ISO3601-G 

212.00 1.57 ISO3601-G 

218.00 1.61 ISO3601-G 

224.00 1.65 ISO3601-G 

227.00 1.67 ISO3601-G 

230.00 1.69 ISO3601-G 

236.00 1.73 ISO3601-G 

239.00 1.75 ISO3601-G 

243.00 1.77 ISO3601-G 

250.00 1.82 ISO3601-G 

254.00 1.84 ISO3601-G 

258.00 1.87 ISO3601-G 

261.00 1.89 ISO3601-G 

265.00 1.91 ISO3601-G 

268.00 1.92 ISO3601-G 

272.00 1.96 5.30 ISO3601-G 

+/- 0.13 

276.00 1.98 ISO3601-G 

280.00 2.01 ISO3601-G 

283.00 2.03 ISO3601-G 

286.00 2.05 ISO3601-G 

290.00 2.08 ISO3601-G 

295.00 2.11 ISO3601-G 

300.00 2.14 ISO3601-G 

303.00 2.16 ISO3601-G 

307.00 2.19 ISO3601-G 

311.00 2.21 ISO3601-G 

315.00 2.24 ISO3601-G 

320.00 2.27 ISO3601-G 

325.00 2.30 ISO3601-G 

330.00 2.33 ISO3601-G 

335.00 2.36 ISO3601-G 

340.00 2.40 ISO3601-G 

345.00 2.43 ISO3601-G 

350.00 2.46 ISO3601-G 

355.00 2.49 ISO3601-G 

360.00 2.52 ISO3601-G 

365.00 2.56 ISO3601-G 

370.00 2.59 ISO3601-G 

375.00 2.62 ISO3601-G 

379.00 2.64 ISO3601-G 

383.00 2.67 ISO3601-G 

387.00 2.70 ISO3601-G 

391.00 2.72 ISO3601-G 

395.00 2.75 ISO3601-G 

400.00 2.78 ISO3601-G 

10.46 0.13 BS1806-309, AS568-309 

12.07 0.13 BS1806-310, AS568-310 

13.64 0.18 BS1806-311, AS568-311 

15.24 0.23 5.33 BS1806-312, AS568-312 

16.81 0.23 +/- 0.13 BS1806-313, AS568-313 

18.42 0.25 BS1806-314, AS568-314 

19.99 0.25 BS1806-315, AS568-315 

21.59 0.25 BS1806-316, AS568-316 

23.16 0.25 BS1806-317, AS568-317 

24.77 0.25 BS1806-318, AS568-318 

26.34 0.25 BS1806-319, AS568-319 

27.94 0.30 BS1806-320, AS568-320 

29.51 0.30 BS1806-321, AS568-321 

31.12 0.30 BS1806-322, AS568-322 

32.69 0.30 BS1806-323, AS568-323 

34.29 0.30 BS1806-324, AS568-324 

37.47 0.38 BS1806-325, AS568-325, R28 

40.64 0.38 BS1806-326, AS568-326, R29 

43.82 0.38 BS1806-327, AS568-327, R30 

46.99 0.38 BS1806-328, AS568-328, R31 

50.17 0.46 BS1806-329, AS568-329, R32 

53.34 0.46 BS1806-330, AS568-330, R33 

56.52 0.46 BS1806-331, AS568-331, R34 

59.69 0.46 BS1806-332, AS568-332, R35 

62.87 0.51 BS1806-333, AS568-333, R36 

66.04 0.51 BS1806-334, AS568-334, R37 

69.22 0.51 BS1806-335, AS568-335, R38 

72.39 0.51 BS1806-336, AS568-336, R39 

75.57 0.61 BS1806-337, AS568-337, R40 

78.74 0.61 BS1806-338, AS568-338, R41 

81.92 0.61 BS1806-339, AS568-339, R42 

85.09 0.61 BS1806-340, AS568-340, R43 

88.27 0.61 BS1806-341, AS568-341, R44 

91.44 0.71 BS1806-342, AS568-342, R45 

94.62 0.71 BS1806-343, AS568-343, R46 

97.79 0.71 BS1806-344, AS568-344, R47 

100.97 0.71 BS1806-345, AS568-345, R48 

104.14 0.71 BS1806-346, AS568-346, R49 

107.32 0.76 BS1806-347, AS568-347, R50 

110.49 0.76 BS1806-348, AS568-348, R51 

113.67 0.76 BS1806-349, AS568-349, R52 

5.33 

116.84 0.76 BS1806-350, AS568-350 

+/- 0.13 

120.02 0.76 BS1806-351, AS568-351 

123.19 0.76 BS1806-352, AS568-352 

126.37 0.94 BS1806-353, AS568-353 

129.54 0.94 BS1806-354, AS568-354 

132.72 0.94 BS1806-355, AS568-355 

135.89 0.94 BS1806-356, AS568-356 

139.07 0.94 BS1806-357, AS568-357 

142.24 0.94 BS1806-358, AS568-358 

145.42 0.94 BS1806-359, AS568-359 

148.59 0.94 BS1806-360, AS568-360 

151.77 0.94 BS1806-361, AS568-361 

158.12 1.02 BS1806-362, AS568-362 

164.47 1.02 BS1806-363, AS568-363 

170.82 1.02 BS1806-364, AS568-364 

177.17 1.02 BS1806-365, AS568-365 

183.52 1.14 BS1806-366, AS568-366 

189.87 1.14 BS1806-367, AS568-367 

196.22 1.14 BS1806-368, AS568-368 

202.57 1.14 BS1806-369, AS568-369 

208.92 1.27 BS1806-370, AS568-370 

215.27 1.27 BS1806-371, AS568-371 

221.62 1.27 BS1806-372, AS568-372 

227.97 1.27 BS1806-373, AS568-373 

234.32 1.40 BS1806-374, AS568-374 

240.67 1.40 BS1806-375, AS568-375 

247.02 1.40 BS1806-376, AS568-376 

253.37 1.40 BS1806-377, AS568-377 

266.07 1.52 BS1806-378, AS568-378 

278.77 1.52 BS1806-379, AS568-379 

291.47 1.65 BS1806-380, AS568-380 

304.17 1.65 BS1806-381, AS568-381 

329.57 1.65 BS1806-382, AS568-382 

354.97 1.78 BS1806-383, AS568-383





(mm) 



Cross Section 






(mm) 



Cross Section 


O-ring sizes 

380.37 1.78 BS1806-384, AS568-384 

405.26 1.91 BS1806-385, AS568-385 

430.66 2.03 BS1806-386, AS568-386 

456.06 2.16 BS1806-387, AS568-387 

481.46 2.29 BS1806-388, AS568-388 

506.86 2.41 5.33 BS1806-389, AS568-389 

532.26 2.41 +/- 0.13 BS1806-390, AS568-390 

557.66 2.54 BS1806-391, AS568-391 

582.68 2.67 BS1806-392, AS568-392 

608.08 2.79 BS1806-393, AS568-393 

633.48 2.92 BS1806-394, AS568-394 

658.88 3.05 BS1806-395, AS568-395 

44.30 0.30 BS4518 0443-57 

45.30 0.30 BS4518 0453-57 

49.30 0.30 BS4518 0493-57 

52.30 0.40 BS4518 0523-57 

54.30 0.40 BS4518 0543-57 

55.30 0.40 BS4518 0553-57 

59.30 0.40 BS4518 0593-57 

62.30 0.40 BS4518 0623-57 

64.30 0.40 BS4518 0643-57 

69.30 0.40 BS4518 0693-57 

74.30 0.40 BS4518 0743-57 

79.30 0.40 BS4518 0793-57 

84.30 0.50 BS4518 0843-57 

89.30 0.50 BS4518 0893-57 

94.30 0.50 BS4518 0943-57 

99.30 0.50 BS4518 0993-57 

104.30 0.50 BS4518 1043-57 

109.30 0.50 BS4518 1093-57 

114.30 0.50 BS4518 1143-57 

119.30 0.50 BS4518 1193-57 

124.30 0.60 BS4518 1243-57 

129.30 0.60 BS4518 1293-57 

134.30 0.60 BS4518 1343-57 

139.30 0.60 BS4518 1393-57 

144.30 0.60 BS4518 1443-57 

149.30 0.60 BS4518 1493-57 

154.30 0.60 BS4518 1543-57 

5.70 

159.30 0.60 

+/- 0.12 

BS4518 1593-57 

164.30 0.60 BS4518 1643-57 

169.30 0.60 BS4518 1693-57 

174.30 0.60 BS4518 1743-57 

179.30 0.60 BS4518 1793-57 

184.30 0.80 BS4518 1843-57 

189.30 0.80 BS4518 1893-57 

194.30 0.80 BS4518 1943-57 

199.30 0.80 BS4518 1993-57 

209.30 0.80 BS4518 2093-57 

219.30 0.80 BS4518 2193-57 

229.30 0.80 BS4518 2293-57 

239.30 0.80 BS4518 2393-57 

249.30 0.80 BS4518 2493-57 

259.30 1.00 BS4518 2593-57 

269.30 1.00 BS4518 2693-57 

279.30 1.00 BS4518 2793-57 

289.30 1.00 BS4518 2893-57 

299.30 1.00 BS4518 2993-57 

309.30 1.50 BS4518 3093-57 

319.30 1.50 BS4518 3193-57 

339.30 1.50 BS4518 3393-57 

359.30 1.50 BS4518 3593-57 

379.30 1.50 BS4518 3793-57 

389.30 1.50 BS4518 3893-57 

399.30 1.50 BS4518 3993-57 

419.30 2.00 BS4518 4193-57 

439.30 2.00 BS4518 4393-57 

459.30 2.00 BS4518 4593-57 

479.30 2.00 5.70 BS4518 4793-57 

489.30 2.00 +/- 0.12 BS4518 4893-57 

499.30 2.00 BS4518 4993-57 

113.67 0.84 BS1806-425, AS568-425, R53 

116.84 0.84 BS1806-426, AS568-426, R54 

120.02 0.84 BS1806-427, AS568-427, R55 

123.19 0.84 BS1806-428, AS568-428, R56 

126.37 0.94 BS1806-429, AS568-429, R57 

129.54 0.94 BS1806-430, AS568-430, R58 

132.72 0.94 BS1806-431, AS568-431, R59 

135.89 0.94 BS1806-432, AS568-432, R60 

139.07 0.94 BS1806-433, AS568-433, R61 

142.24 0.94 BS1806-434, AS568-434, R62 

145.42 0.94 BS1806-435, AS568-435, R63 

148.59 0.94 BS1806-436, AS568-436, R64 

151.77 0.94 BS1806-437, AS568-437, R65 

158.12 1.02 BS1806-438, AS568-438, R66 

164.47 1.02 BS1806-439, AS568-439, R67 

170.82 1.02 BS1806-440, AS568-440, R68 

177.17 1.02 BS1806-441, AS568-441, R69 

183.52 1.14 BS1806-442, AS568-442, R70 

189.87 1.14 BS1806-443, AS568-443, R71 

196.22 1.14 BS1806-444, AS568-444, R72 

202.57 1.14 BS1806-445, AS568-445, R73 

215.27 1.40 BS1806-446, AS568-446, R74 

227.97 1.40 BS1806-447, AS568-447, R75 

240.67 1.40 BS1806-448, AS568-448, R76 

253.37 1.40 BS1806-449, AS568-449, R77 

6.99 

266.07 1.52 BS1806-450, AS568-450, R78 

+/- 0.15 

278.77 1.52 BS1806-451, AS568-451, R79 

291.47 1.52 BS1806-452, AS568-452, R80 

304.17 1.52 BS1806-453, AS568-453, R81 

316.87 1.52 BS1806-454, AS568-454, R82 

329.57 1.52 BS1806-455, AS568-455, R83 

342.27 1.78 BS1806-456, AS568-456, R84 

354.97 1.78 BS1806-457, AS568-457, R85 

367.67 1.78 BS1806-458, AS568-458, R86 

380.37 1.78 BS1806-459, AS568-459, R87 

393.07 1.78 BS1806-460, AS568-460, R88 

405.26 1.91 BS1806-461, AS568-461 

417.96 1.91 BS1806-462, AS568-462 

430.66 2.03 BS1806-463, AS568-463 

443.36 2.16 BS1806-464, AS568-464 

456.06 2.16 BS1806-465, AS568-465 

468.76 2.16 BS1806-466, AS568-466 

481.46 2.29 BS1806-467, AS568-467 

494.16 2.29 BS1806-468, AS568-468 

506.86 2.41 BS1806-469, AS568-469 

532.26 2.41 BS1806-470, AS568-470 

557.66 2.54 BS1806-471, AS568-471 

582.68 2.67 BS1806-472, AS568-472 

608.08 2.79 BS1806-473, AS568-473 

633.48 2.92 BS1806-474, AS568-474 

658.88 3.05 BS1806-475, AS568-475 

109.00 0.89 ISO3601-G 

112.00 0.91 ISO3601-G 

115.00 0.93 ISO3601-G 

118.00 0.95 ISO3601-G 

122.00 0.97 ISO3601-G 

7.00 

125.00 0.99 

+/- 0.15 

ISO3601-G 

128.00 1.01 ISO3601-G 

132.00 1.04 ISO3601-G 

136.00 1.07 ISO3601-G 

140.00 1.09 ISO3601-G 

142.50 1.11 ISO3601-G 

63







O Ring Sizes 


(mm) 



Cross Section 



(mm) 



Cross Section 


64 

145.00 1.13 ISO3601-G 

147.50 1.14 ISO3601-G 

150.00 1.16 ISO3601-G 

152.50 1.18 ISO3601-G 

155.00 1.19 ISO3601-G 

157.50 1.21 ISO3601-G 

160.00 1.23 ISO3601-G 

162.50 1.24 ISO3601-G 

165.00 1.26 ISO3601-G 

167.50 1.28 ISO3601-G 

170.00 1.29 ISO3601-G 

172.50 1.31 ISO3601-G 

175.00 1.33 ISO3601-G 

177.50 1.34 ISO3601-G 

180.00 1.36 ISO3601-G 

182.50 1.38 ISO3601-G 

185.00 1.39 ISO3601-G 

187.50 1.41 ISO3601-G 

190.00 1.43 ISO3601-G 

195.00 1.46 ISO3601-G 

200.00 1.49 ISO3601-G 

203.00 1.51 ISO3601-G 

206.00 1.53 ISO3601-G 

212.00 1.57 ISO3601-G 

218.00 1.61 ISO3601-G 

224.00 1.65 ISO3601-G 

227.00 1.67 ISO3601-G 

230.00 1.69 ISO3601-G 

236.00 1.73 ISO3601-G 

239.00 1.75 ISO3601-G 

243.00 1.77 ISO3601-G 

250.00 1.82 ISO3601-G 

254.00 1.84 ISO3601-G 

7.00 

258.00 1.87 ISO3601-G 

+/- 0.15 

261.00 1.89 ISO3601-G 

265.00 1.91 ISO3601-G 

268.00 1.92 ISO3601-G 

272.00 1.96 ISO3601-G 

276.00 1.98 ISO3601-G 

280.00 2.01 ISO3601-G 

283.00 2.03 ISO3601-G 

286.00 2.05 ISO3601-G 

290.00 2.08 ISO3601-G 

295.00 2.11 ISO3601-G 

300.00 2.14 ISO3601-G 

303.00 2.16 ISO3601-G 

307.00 2.19 ISO3601-G 

311.00 2.21 ISO3601-G 

315.00 2.24 ISO3601-G 

320.00 2.27 ISO3601-G 

325.00 2.30 ISO3601-G 

330.00 2.33 ISO3601-G 

335.00 2.36 ISO3601-G 

340.00 2.40 ISO3601-G 

345.00 2.43 ISO3601-G 

350.00 2.46 ISO3601-G 

355.00 2.49 ISO3601-G 

360.00 2.52 ISO3601-G 

365.00 2.56 ISO3601-G 

370.00 2.59 ISO3601-G 

375.00 2.62 ISO3601-G 

379.00 2.64 ISO3601-G 

383.00 2.67 ISO3601-G 

387.00 2.70 ISO3601-G 

391.00 2.72 ISO3601-G 

395.00 2.75 ISO3601-G 

400.00 2.78 ISO3601-G 

406.00 2.82 ISO3601-G 

412.00 2.85 ISO3601-G 

418.00 2.89 ISO3601-G 

425.00 2.93 ISO3601-G 

429.00 2.96 ISO3601-G 

433.00 2.99 ISO3601-G 

437.00 3.01 ISO3601-G 

443.00 3.05 ISO3601-G 

450.00 3.09 ISO3601-G 

456.00 3.13 ISO3601-G 

462.00 3.17 ISO3601-G 

466.00 3.19 ISO3601-G 

470.00 3.22 ISO3601-G 

475.00 3.25 ISO3601-G 

479.00 3.28 ISO3601-G 

483.00 3.30 ISO3601-G 

487.00 3.33 ISO3601-G 

493.00 3.36 ISO3601-G 

500.00 3.41 ISO3601-G 

508.00 3.46 7.00 ISO3601-G 

+/- 0.15 

515.00 3.50 ISO3601-G 

523.00 3.55 ISO3601-G 

530.00 3.60 ISO3601-G 

538.00 3.65 ISO3601-G 

545.00 3.69 ISO3601-G 

553.00 3.74 ISO3601-G 

560.00 3.78 ISO3601-G 

570.00 3.85 ISO3601-G 

580.00 3.91 ISO3601-G 

590.00 3.97 ISO3601-G 

600.00 4.03 ISO3601-G 

608.00 4.08 ISO3601-G 

615.00 4.12 ISO3601-G 

623.00 4.17 ISO3601-G 

630.00 4.22 ISO3601-G 

640.00 4.28 ISO3601-G 

650.00 4.34 ISO3601-G 

660.00 4.40 ISO3601-G 

670.00 4.47 ISO3601-G 

144.10 0.60 BS4518 1441-84 

149.10 0.60 BS4518 1491-84 

154.10 0.60 BS4518 1541-84 

159.10 0.60 BS4518 1591-84 

164.10 0.60 BS4518 1641-84 

169.10 0.60 BS4518 1691-84 

174.10 0.60 BS4518 1741-84 

179.10 0.60 BS4518 1791-84 

184.10 0.80 BS4518 1841-84 

189.10 0.80 

8.40 

BS4518 1891-84 

+/- 0.15 

194.10 0.80 BS4518 1941-84 

199.10 0.80 BS4518 1991-84 

204.10 0.80 BS4518 2041-84 

209.10 0.80 BS4518 2091-84 

219.10 0.80 BS4518 2191-84 

229.10 0.80 BS4518 2291-84 

234.10 0.80 BS4518 2341-84 

239.10 0.80 BS4518 2391-84 

249.10 0.80 BS4518 2491-84

Index A–I 

3-A Sanitary Standards Inc. 21 

Abrasion 48 

Accelerated ageing 50 

ACM 14 

Acrylonitrile Butadine 16 

Elastomer material types 14 

Elongation 47 

Embrittlement and hardening 50 

EPDM 15 

Epichlorohydrin 14 

O Index Ring A–Z Sizes 

AEM 14 

Aerospace tolerances 55 

Aerospace/Defence 19 

Analysis of elastomer materials 7 

Analytical services 7 

Approvals 19 

AS4716 groove sizes for piston and rod seals 52 

AS568 O-ring sizes 52, 57 

ASTM D1418 material designations 14 

AU 14 

Back-up rings 53 

BGC/PSL/LC6 (Gas specification) 21 

Bio-analytical 19 

BS1806 O-ring sizes (imperial) 57 

BS2494 21 

BS3734 moulding tolerances 56 

BS4518 O-ring sizes (metric) 57 

Butyl 16 

Chemical Compatibility (Online) 9 

Chemical Compatibility (Reference Table) 23 

Chemical compatibility testing 7 

Chemical Processing Industry elastomers 19 

Chemical resistance data 23 

Chemical/Temperature resistance matrix 18 

Chloroprene 14 

Chlorosulphonated Polyethylene 14 

Chlorosulphonylpolyethylene 14 

Clearance gap 53 

Coeffecient of thermal expansion 51 

Comparison of elastomer properties 18 

Component Design 6 

Compression set 49 

Compressive modulus 49 

Compressive stress relaxation 49 

Computer Aided Design (CAD) 6 

Consultancy service 7 

Copolymer 16 

CR 14 

Cross-section 55, 57 

CSM 14 

Cure systems 51 

Customised design service 6 

Datasheets 9 

Defence 19 

Design service 6 

Diesel Engines 19 

Differential Scanning Calorimetry (DSC) 8 

DTD Specification 19 

DVGW 21 

ECO 14 

Ethylene Acrylic 14 

Ethylene-Propylene 15 

EU 14 

Explosive Decompression (ED) 21, 49 

Explosive decompression testing 8 

Extrusion 53 

Face seals 52 

Failure analysis 7 

FCN (Food Contact Notification) 21 

FDA (Food & Drug Administration) 20 

FEA 6 

FEP 15 

FEPM 15 

FFKM (FFPM) 11, 15 

Finite Element Analysis (FEA) 6 

FKM (FPM) 15, 16 

Fluorocarbon 15 

Fluoroelastomer 15 

Fluoroethylene Propylene-Perfluoroalkoxy 15 

Fluorosilicone 16 

Food & Drug Administration 20 

Food Contact Notification 21 

Force, sealing 52 

Friction 48 

FVMQ 16 

Gas Specification 21 

Generator Sets 19 

Glass transition temperature 50 

Groove dimensions 10 

Hardening and embrittlement 50 

Hardness testing 7 

Hardness 48 

Hardware design guidelines 10, 52 

Heat resistance 50 

High Nitrile 16 

HNBR 17 

How to select the correct seal 12 

Hydrongenated Nitrile 17 

IIR 16 

Industry specific elastomers 19 

Infra-red Spectroscopy (FTIR) 8 

Internal diameter 57 

International O-ring sizes 52, 57 

IR 16 

IRHD hardness 48 

ISO 1629 material designations 14 

ISO 3601 54, 57 

KTW 21 

Laboratory testing & analysis 7 

Le Joint Francais 57 

65

Index A–Z 

Index I–Z 

Lead times 5 

Low Nitrile 16 

Low temperature resistance 50 

Manufacturing lead times 5 

Marine Diesel Engine seals 19 

Material approvals 19 

Material Characterisation Centre 7 

Material datasheets 9 

Material testing and analysis 7 

Mechanical evaluation/testing 8 

Medium Nitrile 16 

Metal detectable seals 20 

Microscopy 7 

MIL Specification 19 

Modulus 47 

Moulding tolerances 56 

Natural Rubber 17 

NBR 16 

NES337 Defence Standard 19 

Nitrile 16 

Non-standard O-rings 5 

NR 17 

Nuclear 19 

Offshore 20 

Oil & Gas 20 

Online Chemical Compatibility 9 

Online Helpdesk 10 

Online Literature Library (specs, datasheets & certificates) 9 

Online Material Selector Tool 9 

Online O-ring and Groove Dimension Wizard 10 

O-ring sizes 57 

O-ring tolerances 54, 55 

Outgassing 51 

Ozone resistance 50 

Perfluoroelastomer 11, 15 

Perlast 11 

Permeation 49 

Peroxide cure 51 

PFA 15 

Pharmaceutical 19 

Piston seals 52 

Polyacrylate 14 

Polyacrylic 14 

Polyester 14 

Polyether Urethane 14 

Polyisoprene 16 

Polytetrafluoroethylene 17 

Potable Water 21 

Powder Generation 19 

Pressure 53 

PTFE 11, 17 

PVMQ 17 

Quality 5 

R (LJF) O-ring sizes 57 

Registered trade names 22 

Retained sealing force 49 

Rod seals 52 

SBR 17 

Seal selection – considerations 12 

Sealing force 49 

Selecting the correct seal 12 

Semiconductor 20 

Shore hardness 48 

Shrinkage (volume change) 51 

Silicone 17 

Softening 50 

Spectroscopy 8 

Squeeze 52 

Standard O-ring sizes 57 

Strain energy density 47 

Stress-strain curve 47 

Styrene-Butadine 17 

Sulphur cure 51 

Swelling 23, 50, 51 

Tear strength 48 

Technical design service 5 

Technical support 5 

Temperature range of elastomers 18 

Temperature Retraction (TR) Test 50 

Temperature/Chemical resistance matrix 18 

Tensile strength 47 

Tensile stress 47 

Terminology 47 

Terpolymer 16 

Testing and analysis 7 

Tetrafluoroethylene/Propylene 15, 17 

Tetrapolymer 16 

TFE/P 15, 17 

Thermal analysis 7 

Thermal expansion 51 

Thermogravimetric Analysis (TGA) 8 

Tolerances 51, 55, 57 

Tooling 5 

Trade names 22 

Training and Education 5 

Trapped seals 52 

Types of elastomer 14 

United States Pharmacopiea (USP) 21 

USP Class VI 21 

UV resistance 50 

VMQ 17 

Volume change 51 

Volume loss 49, 50 

Water grade seals 21 

Wear 48 

Weathering 50 

Website tools 9 

WRC (Water Research Council) 21 

66

Elastomer Compounds Chemical Compatibility

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