Emer-Seal PU25 TDS - Parchem

Technical Data SheetEmer-Seal PU25High performance, flexible, one-component, polyurethane joint sealantUSESSealing joints in concrete panels, fibrous cement products,external cladding panels, blockwork and brickwork. Also insealing joints around aluminium and timber door andwindow frames and between metal. Also suitable forsealing sawn joints up to 10 mm wide in concrete floorsand pavements.ADVANTAGES• Excellent primerless adhesion to concrete, timber,masonry, bricks, aluminium, metal and ceramics• Neutral cure• Low odour• Fast skinning and fast curingDESCRIPTIONEmer-Seal PU25 is a high performance elastomeric jointsealant based on polyurethane technology. Emer-SealPU25 uses a neutral cure system reacting on exposure toatmospheric moisture. When cured it forms a waterproofand durable seal, which makes it ideal for exteriorapplications.TECHNICAL SUPPORTParchem also offer a technical support package tospecifiers and contractors which includes on-site, technicaladvice from staff experienced in the construction industry.DESIGN CRITERIAEmer-Seal PU25 may be applied in joints between5 mm and 50 mm wide. All moving joints should bedesigned to an optimum width to depth ratio of 2:1, with aminimum joint size of 5 mm wide by 8 mm deep forporous surfaces or 5 mm wide by 5 mm deep for nonporoussurfaces.Sealing joints in concrete and other masonry surfacesPROPERTIESData quoted are typical for this product but do notconstitute a specification.Form:Smooth, non-slump pasteMovementaccommodationfactor: +/- 25% (total 50%)Skinning time:Cure speed:Typical hardnessShore 'A' (ISO 868): 20100% Modulus(ISO 8339):15 mins at 23°C, 50% RH3 mm / day 23°C 50% RH0.20 MPaElongation at break: >600%Chemical resistance tooccasional spillage:Good resistance to diluteacids and alkalisContinuous servicetemperature range: - 30°C to + 80MAINTENANCEBacking RodEmer-Seal PU25There are no special requirements, however, any damagefound during routine inspections should be cut out andreplaced.PARCHEM CONCRETE REPAIR FLOORING JOINTING SYSTEMS WATERPROOFINGTECHNICAL DATA SHEET JANUARY 2013www.parchem.com.au 7 Lucca Road, Wyong NSW 2259 Sales 1800 801 108 Technical 1800 812 864 ABN 80 069 961 968 1

Emer-Seal PU25SPECIFICATION CLAUSESWhere so indicated on the drawings, joints are to be sealedusing Emer-Seal PU25, a one part polyurethane joint sealantas supplied by Parchem. The sealant must be capable of +/-25% joint movement, have an elongation at break (NFT 85507) of greater than 600%, Shore A hardness in the range of15-25 and an elastic modulus at 100% elongation (ISO 8339)of 0.15 - 0.25 MPa.Joints must be prepared and primed where required inaccordance with the current technical data sheet.The product manufacturer must be accredited to ISO 9001.The sealant and associated materials must be installed by acontractor nominated by the supplier.APPLICATION INSTRUCTIONSPREPARATIONThe joint surfaces must be thoroughly dry, clean and frostfree. Remove all dirt, laitance, loose materials and foreignmatter. Remove all rust, scale and protective lacquers frommetal surfaces. Non-porous surfaces should be degreasedusing Parchem Solvent 10.In all joints a bond breaker must be used to prevent sealantcontact with the back of the joint, to allow optimum sealantperformance.In shallow joints self-adhesive polyethylene tape canbe used.Deep joints should incorporate a backing strip such asExpandafoam or Stiffjoint to support the sealant while alsoacting as a bond breaker.PRIMING REQUIREMENTSGood adhesion can be gained to clean, dry,uncontaminated concrete, timber, metals, ceramics,brickwork and most coating surfaces without the use ofprimers. On some surfaces however, adhesion may beimproved by the use of a primer. Where doubt exists overthe suitability of the substrate for unprimed adhesion, sitetrials should be conducted in conjunction with primingadvice from Parchem. In most applications optimumadhesion to concrete and other porous materials can beachieved using Primer 21. Primer 13 must be used onconcrete in applications subject to semi-permanent or longterm water immersion. On non-porous materials such asaluminium, stainless steel and galvanised metals, Primer 4or Primer 6 is recommended.APPLICATIONExtrude the sealant firmly into joint to ensure completecontact with joint faces. Smooth finish if necessary with aspatula wetted with a dilute detergent solution.CLEANINGClean tools immediately after use with Parchem Solvent.LIMITATIONSDo not apply Emer-Seal PU25 to bituminous surfaces orallow bitumen to contact Emer-Seal PU25.Paintability - although polyurethane sealants will generallyaccept painting with acrylic coatings, it is possible forplasticisers to migrate over time and stain the surface of thecoating. Parchem recommends the use of of Emer-Seal MSin these applications.ESTIMATINGSupply: 600 ml foil sachet, cartons of 20Coverage:STORAGEOn average one 600 ml sachetwill supply 12 metres of 10 mmx 5 mm sealant beadShelf life 6 months. Store in a cool dry place.IMPORTANT NOTICEA Material Safety Data Sheet (MSDS) and Technical Data Sheet(TDS) are available from the Parchem website or upon requestfrom the nearest Parchem sales office. Read the MSDS andTDS carefully prior to use as application or performance datamay change from time to time. In emergency, contact anyPoisons Information Centre (phone 13 11 26 within Australia)or a doctor for advice.PRODUCT DISCLAIMERThis Technical Data Sheet (TDS) summarises our best knowledge ofthe product, including how to use and apply the product based on theinformation available at the time. You should read this TDS carefullyand consider the information in the context of how the product will beused, including in conjunction with any other product and the type ofsurfaces to, and the manner in which, the product will be applied. Ourresponsibility for products sold is subject to our standard terms andconditions of sale. Parchem does not accept any liability either directlyor indirectly for any losses suffered in connection with the use orapplication of the product whether or not in accordance with anyadvice, specification, recommendation or information given by it.GUN LOADINGEmer-Seal PU25 is applied using a suitable sealant gun.Insert the sachet into the gun, cut a slit in the top of thesachet, replace the end cap and apply the sealant.PARCHEM CONCRETE REPAIR FLOORING JOINTING SYSTEMS WATERPROOFINGTECHNICAL DATA SHEET JANUARY 2013www.parchem.com.au 7 Lucca Road, Wyong NSW 2259 Sales 1800 801 108 Technical 1800 812 864 ABN 80 069 961 9682