Structural Bonding

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52 Gasketing & Sealing Gaskets are used to prevent fluid or gas leaks by forming impervious barriers. For successful gasketing, the seal must remain intact and leak-free over a prolonged period of time. Therefore, the gasket must resist the fluid and / or gaseous medium being sealed or excluded, and withstand the operating temperatures and pressures to which it is subjected. There are three types of flange gaskets. 1. Conventional pre-cut compression gaskets are made from paper, rubber, cork, metal or other materials. 2. Formed-in-Place (FIP) gaskets are applied as a liquid sealant to one of the flange surfaces before the parts are assembled. After assembly, the FIP gasket spreads and cures between the flanges, filling gaps, scratches, and surface irregularities to provide a durable seal. 3. Cured-in-Place (CIP) gaskets are applied as liquids by tracing machines that dispense the gasket material in precise beads to one of the flanges. The material is cured by ultraviolet (UV) light to form an elastomeric material with adhesion to the flange surface. Sealing is achieved through compression of the cured gasket during flange assembly. What is the best gasket for my application? Many factors influence gasket choice. The following chart is intended to serve as a general guideline to help you determine which gasket type is best suited for your application. The data presented herein reflects typical properties for each gasket type; however, there may be exceptions to the data presented. Individual product information can then be found on the following pages and will help you narrow your search. This chart should not be used to specify products without specific testing. It is recommended that you conduct on-part testing to ensure product performance before specifying any gasketing product. Loctite® Adhesives and Sealants Product Specialists are available to assist you with new product designs, or to help you re- engineer an existing application for improved performance and cost savings. They can also set up testing of your parts at the Henkel Customer Engineering Center. For application assistance, call 1-800-LOCTITE (562- 8483) or visit www.loctite.com and select “Contact Loctite.” In Canada, please call 1-800-263-5043.
Gasketing & Sealing Selector Guide GENERAL COMPARISON Conventional Gasket Dressings BENEFITS Versatile, immediate green strength (sticky) LIMITATIONS PERFORMANCE CONSIDERATIONS TEMPERATURE RESISTANCE Non-curing, limited gap fill, % shrinkage Conventional Gasket Dressings Cured-In-Place Silicones High gap filling, reusable / serviceable gasket, immediate fill properties GASKET TYPE Formed-In-Place Anaerobics Improved structural strength, long open time, high pressure seal Requires process equipment Limited fill Cured-In-Place Silicones GASKET TYPE Formed-In-Place Anaerobics Formed-In-Place Modified Silanes High gap filling, improved strength / adhesion over silicones, paintable Limited temperature performance Formed-In-Place Modified Silanes Formed-In-Place Silicones High gap filling, resistant to dynamic fatigue, on-line pressure testing Short open time Formed-In-Place Silicones Continuous Operation -65°F to +400°F -60°F to +400°F -40°F to +300°F -40°F to +200°F -60°F to +400°F Maximum +600°F +500°F +400°F +200°F +725°F FLUID RESISTANCE Oil Yes Yes Yes Limited Yes Water/Glycol Yes Yes Yes Yes Yes Fuel Limited No Limited Limited No Transmission Fluid Yes Yes Yes Limited Yes GAP FILL Ideal 0.001" to 0.005" 0.020" to 0.125" 0.001" to 0.005" 0.001" to 0.125" 0.001" to 0.125" Maximum 0.010" 0.240" 0.050" 0.240" 0.240" INSTANT SEAL High Pressure High Pressure Low Pressure Low Pressure Low Pressure FLANGE TYPE Rigid or Flexible Rigid or Flexible Rigid Rigid or Flexible Rigid or Flexible SUITABLE FOR USE WITH: Metals Yes Yes Yes Yes Yes Plastics* Yes Yes No Yes Yes PROCESS CONSIDERATIONS Conventional Gasket Dressings Cured-In-Place Silicones GASKET TYPE Formed-In-Place Anaerobics Formed-In-Place Modified Silanes Formed-In-Place Silicones NUMBER OF COMPONENTS 1 1 1 1 1 CURE METHOD Not Applicable UV / RTV Anaerobic Moisture RTV CURE TEMPERATURE Room Temperature Room Temperature Room Temperature Room Temperature Room Temperature CURE SPEED Initial Cure Immediate 15 to 30 seconds 15 to 30 minutes 15 to 30 minutes 15 to 30 minutes Full Cure Not Applicable 30 seconds 24 to 72 hours 1 to 7 days 1 to 7 days PROCESSING OPTIONS Manual Yes No Yes Yes Yes Automated No Yes Yes Yes Yes For more information on each adhesive category refer to pages… 55-57 60-63 54, 56-57 58-59 60, 62-63 * Uncured liquid adhesives may cause stress cracking of certain thermoplastics (e.g., polycarbons, acrylic, and polysulfone). Special products and process techniques are available. Consult the Loctite ® Design Guide to <strong>Bonding</strong> Plastics (LT-2197) or call 1-800-LOCTITE for more information. 53 GASKETING & SEALING Selector Guide
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the adhesive sourcebook 2008 Loctit
Page 3 and 4: Table of Contents At Henkel Corpora
Page 5 and 6: Bonding Selector Guide PERFORMANCE
Page 7 and 8: TOUGHENED (continued) LOCTITE ® 43
Page 9 and 10: Loctite® Instant Adhesives Propert
Page 11 and 12: DISPENSING OPTIONS Loctite ® Hysol
Page 13 and 14: Loctite® Hysol® Hot Melt Adhesive
Page 15 and 16: ACRYLIC ADHESIVES LOCTITE ® 352 L
Page 17 and 18: Loctite® Light Cure Adhesives Prop
Page 19 and 20: Loctite® Elastomeric Adhesives & S
Page 21 and 22: Loctite® Solvent-Based Adhesives P
Page 23 and 24: Loctite® Magnet Bonding Structural
Page 25 and 26: HIGH TEMPERATURE / CHEMICAL RESISTA
Page 27 and 28: Are your design challenges too puzz
Page 29 and 30: Loctite® Multiple Surface Bonding
Page 31 and 32: Loctite® Multiple Surface Bonding
Page 33 and 34: GENERAL BONDING Fast Room Temperatu
Page 35 and 36: Structural Bonding Selector Guide S
Page 37 and 38: Coatings Selector Guide Rust Treatm
Page 39 and 40: Low Friction, Turbulence Resistance
Page 41 and 42: Loctite® Protective Coatings Prope
Page 43 and 44: LIQUID/ SLURRY TURBULENCE LOCTITE
Page 45 and 46: Loctite® Wear-Resistant Coatings A
Page 47 and 48: Anti-Slip Coatings Selector Guide L
Page 49 and 50: Loctite® Big Foot® Anti-Slip Coat
Page 51 and 52: FLOOR REPAIR AND RESURFACING (conti
Page 53: Loctite® Fixmaster® Flooring & Gr
Page 57 and 58: SEALANTS / DRESSINGS FOR EXISTING G
Page 59 and 60: Loctite® Gasketing & Sealing Anaer
Page 61 and 62: Loctite® Elastomeric Adhesives & S
Page 63 and 64: CURED- IN - PLACE (continued) LOCTI
Page 65 and 66: Loctite® Silicones and Urethane Ga
Page 67 and 68: Anti-Seize Selector Guide General P
Page 69 and 70: HIGH PERFORMANCE LOCTITE ® HEAVY D
Page 71 and 72: Heading Loctite® Anti-Seize Applic
Page 73 and 74: SPECIALTY OILS AND LUBRICANTS (cont
Page 75 and 76: Loctite® Lubricants Properties and
Page 77 and 78: Machining Compounds Selector Guide
Page 79 and 80: Loctite® Clover® Products Chart P
Page 81 and 82: Potting & Encapsulating Selector Gu
Page 83 and 84: TYPICAL UNCURED PROPERTIES TYPICAL
Page 85 and 86: SYSTEM CHARACTERISTICS TYPICAL UNCU
Page 87 and 88: DISPENSING OPTIONS Loctite ® Hysol
Page 89 and 90: Belt Repair & Urethanes Selector Gu
Page 91 and 92: Loctite® Fixmaster® Belt Repair &
Page 93 and 94: GENERAL PURPOSE EPOXIES LOCTITE ®
Page 95 and 96: Loctite® Fixmaster® Maintenance &
Page 97 and 98: Retaining Compounds Selector Guide
Page 99 and 100: LOOSE-FITTING PARTS LOCTITE ® 635
Page 101 and 102: DISPENSING OPTIONS Loctite ® 50 ml
Page 103 and 104: Surface Preparation Selector Guide
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Loctite® Accelerators, Activators
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ELECTRICAL CLEANERS LOCTITE ® ELEC
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Loctite® Cleaners Application Char
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Choosing the right threadlocker for
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HIGH STRENGTH LOCTITE ® 262 THREA
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Loctite® Liquid Threadlockers Prop
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Thread Sealing Selector Guide Gener
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HYDRAULIC SEALANT (continued) LOCTI
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Loctite ® Dispensing Equipment Hen
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Loctite® Toolboxes & Specialty Kit
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Henkel offers the most comprehensiv
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Loctite® Medical Device Acrylic Ad
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Loctite® Medical Device Cyanoacryl
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Loctite® Medical Device Epoxies, S
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EQUIPMENT RENTAL Many of the equipm
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Dispense Systems Loctite® brand di
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Valves & Pumps Loctite® brand disp
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Loctite® Brand Valve & Pump Fluid
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Loctite® Brand Handheld Dispensing
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LOCTITE ® POSI-LINK 50 ML DUAL CA
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Handheld Hot Melt Applicators Locti
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Tapered Dispense Tips General Purpo
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Loctite® Brand Syringe Accessories
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PRODUCT Item Number Lamp Type ENCLO
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Loctite® Brand Mounting Hardware,
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Loctite ® E-05CL Hysol ® Epoxy Ad
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Viscosity Viscosity is a product pr
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To access these and other Engineeri
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MRO Training Services All of the fo
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IDH Number 39716 Loctite ® Clover
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Index Listing by Item and Product N
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INDEX Listing by Item and Product N
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INDEX Listing by Item and Product N
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177 INDEX Listing by Product Name I
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179 INDEX Listing by Product Name I
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THE PROBLEM SOLVER A Quick Referenc
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