WIXLIB

PRODUCT DATA SHEETSikalastic -624 WPSingle component alkali resistant saturating resin for Sikalastic RoofPro waterproofing systemsPRODUCT DESCRIPTIONCHARACTERISTICS / ADVANTAGESSikalastic -624 WP is a cold applied, highly elastic,aliphatic, single component, alkali resistant, moisturetriggered polyurethane resin designed for easyapplication as part of Sikalastic RoofPro waterproofingsystems. Proven technology with over 30 year track record Single component - no mixing and ready to use Fully reinforced with highly conformable Sika Reemator Sika Fleece Moisture-triggered chemistry that is rapidlyweatherproof after application Highly elastic and crack bridging Seamless and fully adhered Vapor permeable UV resistant and non-yellowing Abrasion and chemical resistant Alkali resistant formulationUSES Embedment and top resin for Sikalastic RoofProsystems reinforced with Sika Reemat Saturating resin for Sikalastic RoofPro systemsreinforced with Sika Fleece Typically applied in Sikalastic RoofPro Direct, Plaza,and Vegetated systems for both new construction andrefurbishment Ideal for applications involving cementitious overlaysand tile mortarAPPROVALS / STANDARDS Miami Dade County approved: NOA No.: 15-0113.01 Meets ASTM C836 Standard Specification for HighSolids Content, Cold Liquid-Applied ElastomericWaterproofing Membrane for Use with SeparateWearing Course. Meets ASTM E-108-00 Spread of Flame: Class A at aslope of 1:12PRODUCT INFORMATIONChemical BaseMoisture triggered PolyurethanePackaging5 gal. (19 L) pailAppearance / ColorWhite (RAL 9016), Pearl GrayShelf Life9 months (Unopened Container)Storage ConditionsStore dry between 35 F and 77 F (2–25 C). Condition material to 50–77 F(10–25 C) before using for ease of applicationProduct Data SheetSikalastic -624 WPMay 2018, Version 01.010208120200200000181/6

Density10.8 lb./gal. (1294 kg/m3)Solid content by volume71 %Volatile organic compound (VOC) content209 g/l(ASTM D-2697)(ASTM D-2369-81)TECHNICAL INFORMATIONTensile StrengthRef. reinforced system data(ASTM D-751)Elongation at BreakRef. reinforced system data(ASTM D-751)Resistance to Static PunctureRef. reinforced system data(ASTM D-5602)Chemical ResistanceMost common roofing contaminants, oils, grease, dilute acids and basesAPPLICATION INFORMATIONCoverageSika Reemat53 sf/gal - 30 mils wet film thickness40 sf/gal - 40 mils wet film thickness35 sf/gal - 45 mils wet film thicknessSika Fleece15sf/gal - 105 mils wet film thickness19 sf/gal - 85 mils wet film thickness23 sf/gal - 70 mils wet film thicknessNOTE: Coverage rates are optimal - coverage rates will vary depending on temperature, surface roughness andporosity, and application technique.Ambient Air Temperature41 F (5 C) min. / 95 F (35 C) max.Relative Air Humidity80 % R.H. max.Dew PointBeware of condensation.The substrate and uncured coating must be 5 F (3 C) above dew point.Substrate Temperature41 F (5 C) min. / 140 F (60 C) max.Substrate Moisture Content 4 % moisture content Test method: Sika -Tramex meterNo rising moisture according to ASTM (Polyethylene-sheet)Pot LifeSikalastic -624 WP is designed for fast curing. High temperatures combinedwith high air humidity will increase the curing process. Thus, materialinopened containers should be applied immediately. In opened containers,the material will form a film after 1 hour approx. ( at 75 F (24 C) and 50 %R.H.)Cure TimeAmbient conditions 40 F / 50 % r.h. 50 F / 50 % r.h. 70 F / 50 % r.h.Minimum waiting time overcoating14 hours6 hours5 hours*After 7 days the surface must be cleaned and primed with Sika Reactivation Primer before continuing.Note: Times are approximate and will be affected by changing ambientconditions particularly temperature and relative humidity.Applied Product Ready for UseAmbientconditions 40 F / 50 % r.h. 50 F / 50 % r.h. 70 F / 50 % r.h.Rain resistantTouch dryFull cure10 min.10 min.10 min.12 hours6 hours4 hours24 hours18–24 hours12–18 hoursNote: Times are approximate and will be affected by changing ambientProduct Data SheetSikalastic -624 WPMay 2018, Version 01.010208120200200000182/6

conditions particularly temperature and relative humidity.Product Data SheetSikalastic -624 WPMay 2018, Version 01.010208120200200000183/6

Product Data SheetSikalastic -624 WPMay 2018, Version 01.010208120200200000184/6

APPLICATION INSTRUCTIONSSURFACE PREPARATIONAll substrate surfaces shall be clean, dry and sound.Acceptable substrates include: sound concrete andcementitious screed, metals, wood, modified bitumen,mineralized felt, EPDM, hypalon, TPO, sprayedpolyurethane foam, brick and stone, slate and tile, andexisting liquid applied membranes. Reference separateSystem Data Sheet for specific surface preparationrequirements.PrimerApply primer of a type suitable for the substrate. Allowprimer to cure completely before applying Sikalastic 624 WP resin. Reference separate System Data Sheet forspecific primer recommendations.MIXINGNo mixing necessaryAPPLICATIONSika Reemat - Base ResinApply Sikalastic -624 WP resin to the primed substratesurface by means of 1/2” (12.7 mm) nap phenolic resincore roller or brush at the specified application rate toachieve a uniform and consistent wet mil thickness(reference separate System Data Sheet). Material canalso be squeegee or spray applied, in which case itshould also be backrolled. Apply Sika Reemat into thewet embedment resin and roll the scrim to achieve fullsaturation and embedment. Reemat shall be cut toconform to substrate transitions and flashing conditions,with a typical 2” (50.8 mm) reinforcement overlap. Resinshall saturate the Reemat from below. Apply additionalSikalastic -624 WP resin as required to ensure full scrimembedment. Allow to cure completely before applyingsubsequent resin layers.Sika Reemat - Intermediate and Top ResinApply Sikalastic -624 WP resin to the curedSikalastic /Reemat base layer by means of 1/2” (12.7mm) nap phenolic resin core roller or brush at thespecified application rate to achieve a uniform andconsistent wet mil thickness (reference separate SystemData Sheet). Material can also be squeegee or sprayapplied, in which case it should also be backrolled. Allowto cure completely before applying subsequent resinlayer, if specified.Sika FleeceApply Sikalastic -624 WP resin to the primed substratesurface by means of 1/2” (12.7 mm) nap phenolic resincore roller or brush to achieve a uniform and consistentthickness, applying approximately 2/3 of the resinrequired to achieve the specified application rate(reference separate System Data Sheet). Apply SikaFleece into the wet embedment resin and roll the fleeceProduct Data SheetSikalastic -624 WPMay 2018, Version 01.010208120200200000185/6to achieve partial saturation and full embedment. Fleeceshall be cut to conform to substrate transitions andflashing conditions, with typical 3” (76.2 mm) side and6” (152.4 mm) end reinforcement overlaps. Resin shallsaturate the Fleece from below. Apply remaining 1/3 ofthe specified resin quantity to ensure full fleecesaturation and an even resin application.CLEANING OF TOOLSClean all tools and application equipment withappropriate solvent immediately after use. Hardenedand/or cured material can only be removedmechanicallyLIMITATIONS Minimum age of concrete must be 28 days dependingon curing and drying conditions. Do not thin with solvents. Do not store materials outdoors exposed to sunlightand moisture for prolonged periods. Do not apply to substrate surfaces where moisturevapor transmission will occur during application andcure. This condition may be checked using ASTM D4263 (Polyethylene Sheet method). Substrate must be dry prior to application. Do notapply to a frosted, wet or damp surface. Allow sufficient time for the substrate to dry after rainor inclement weather, as there is the potential forbonding problems. On substrates likely to exhibit outgassing apply duringfalling ambient and substrate temperature. If applied during rising temperature pinholing mayoccur. Use sunglasses with UV filter when applying highlyreflective white resins. Do not use for indoor applications. Precautions should be taken to prevent vapors and/orodors from entering the building/ structure, includingbut not limited to turning off and sealing air intakevents and throughwallair conditioners, and othermeans of vapor/odor ingress during application andcure. For areas with direct exposure to heavy or frequentfoot traffic, an additional wear coat protection with slipresistant aggregate is required. Opening to traffic priorto cure may result in loss of aggregate or permanentstaining and subsequent premature failure. Any repairs required to achieve a level surface must beperformed prior to application (consult a Sikarepresentative for guidance on various productsolutions). Surface irregularities may reflect throughthe cured system. When applying over existing coatings or membranescompatibility and adhesion testing, and subsequentapproval by Technical Services is required. Opening to traffic prior to cure may result in loss ofaggregate or permanent staining and subsequentpremature failure On grade concrete decks should not be covered with