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TechnicaldatasheetforSILRES?BS290/Version:1.5/Dateoflastalteration:11.04.20171/3 Productdescription SILRES?BS290isasolventlesssiliconeconcentrate thatisbasedonamixtureofsilaneandsiloxane. SILRES?BS290isdilutablewithorganicsolvents. DilutesolutionsofSILRES?BS290inorganic solventsserveashigh-qualitygeneral-purposewater repellentsforimpregnatingandprimingmineraland highlyalkalinesubstrates. Specialfeatures -gooddepthofpenetration -highresistancetoalkalis -tack-freedrying -effectiveevenondampsubstrates -rapiddevelopmentofwaterrepellency Afterapplicationtothemineralsubstrate，SILRES?BS 290reactswiththeatmosphericmoistureorporewater inthesubstrate，therebygeneratingtheactive ingredientwhileliberatingalcohol.Theactive ingredientgreatlylowersthewaterabsorbencyofthe substrate，whichneverthelessretainsaveryhigh degreeofwatervapourpermeabilitysinceneither poresnorcapillariesareclogged. Application SILRES?BS290issuitableforimpartingwater repellencytoabsorbent，porous，mineralconstruction materials，e.g.: -brickwork -allkindsofconcrete -aeratedconcrete -sand-limebrickwork -cementfiberboards -mineralplasters -mineral-basednaturalandartificialstone -mineralpaints SILRES?BS290isalsosuitableasprimerforexterior paints. SILRES?BS290isnotsuitableforrenderinggypsum waterrepellent. Processing Flooding，preferablynotunderpressure，isthebest techniqueforapplyingSILRES?BS290，whichis readytouseafterdilution.Applyseveralcoats，weton wet，untilthesubstrateissaturated.Generally，atleast twoapplicationssufficeforallsubstrates. Donotleavelongbreaksbetweencoats.Applythe nextwhenthesubstratehasabsorbedtheprevious oneandisnolongershiny(wet-on-wetworking).The substratemustnothavedampspots，i.e.，itshould lookdry.TherequisitequantityofSILRES?BS290 dependsontheadsorbencyofthesubstrate.The amountofimpregnatingagentrequiredforasubstrate andtheeffectivenessoftheimpregnationshouldbe determinedonsitebytestingasmallareaofthe materialtobetreated. Dilution ThesolventsbestsuitedfordilutingSILRES?BS290 arealiphatichydrocarbons(e.g.WhiteSpirit130/175)， aromatichydrocarbons(solventnaphtha，e.g.Shellsol A)orlow-odorisoparaffinhydrocarbons(e.g.Isopar H).Thesolventusedshouldhaveaboilingrangeof 140-190°Candanevaporationnumberof30-90. Iftheabove-mentionedhydrocarbonsolventsare used，SILRES?BS290shouldbedilutedinaweight ratioof1:11to1:15.Anhydrousalcohols，suchas ethanolor2-propanol，couldalsobeusedandare evenindispensablewhenevercontactofthe impregnatingagentwithsolvent-sensitivematerials (suchasexpandedpolystyrene，bitumen，etc.)cannot beavoided.Thealcoholmustbecompletely anhydrous.Ifalcoholisusedasasolvent，adilution ratioof1:12pbwisrecommended.Whenimpregnating slightlydampsubstrates，SILRES?BS290willgive betterresultsifdilutedwithhydrocarbonsthanwith alcohol. StirvigorouslywhenaddingthediluenttoSILRES?BS 290.SinceSILRES?BS290reactswithhumidity， prolongedcontactwithairmustbeavoided.The containersmustbehermeticallysealed. BeforeapplyingSILRES?BS290，besuretocover SILRES?BS290 MASONRYWATERREPELLENTSTechnicaldatasheetforSILRES?BS290/Version:1.5/Dateoflastalteration:11.04.20172/3 windowsandothernon-absorbentsurfacesproperly becausetheproductcuressoquicklythatitwillbe extremelydifficult，ifnotimpossible，toremoveaftera fewhours.Wipeoffanysplashesonwindowpanes immediately，usingasolventifnecessary. Forthisreason，thefiguresquotedbelowareintended asaguideonly: Storage The‘Bestusebeforeend‘dateofeachbatchisshown ontheproductlabel. Storagebeyondthedatespecifiedonthelabeldoes notnecessarilymeanthattheproductisnolonger usable.Inthiscasehowever，thepropertiesrequired fortheintendedusemustbecheckedforquality assurancereasons. Safetynotes Comprehensiveinstructionsaregiveninthe correspondingMaterialSafetyDataSheets.Theyare availableonrequestfromWACKERsubsidiariesor maybeprintedviaWACKERwebsite wacker. .Productdata TypicalgeneralcharacteristicsInspectionMethodValue Appearancecolorless，hazy Silane/siloxanecontentapprox.100% Densityat25°CDIN517571，05g/cm3 Viscosity，dynamicDIN5156215-19mPa.s FlashpointISO367942°C Thesefiguresareonlyintendedasaguideandshouldnotbeusedinpreparingspecifications.