Designation:C734−15StandardTestMethodforLow-TemperatureFlexibilityofLatexSealantsAfterArtificialWeathering1ThisstandardisissuedunderthefixeddesignationC734;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversalaboratoryprocedureforthedeterminationoflow-temperatureflexibilityoflatexsealantsafter500hartificialweathering.1.2Thevaluesstatedinmetric(SI)unitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.NOTE1—CurrentlythereisnoISOstandardsimilartothistestmethod.2.ReferencedDocuments2.1ASTMStandards:2C717TerminologyofBuildingSealsandSealantsC1442PracticeforConductingTestsonSealantsUsingArtificialWeatheringApparatus3.Terminology3.1Definitions—RefertoTerminologyC717fordefinitionsofthefollowingtermsusedinthistestmethod:adhesivefailure,latexsealant,sealant,substrate,andstandardcondi-tions.4.SummaryofTestMethod4.1Aslabofthesealantisexposed,afterdrying,foraminimumof500hinanartificialweatheringunit,afterwhichitisconditionedandflexedat−1761°C(062°F).5.SignificanceandUse5.1Thistestevaluatestheflexibilityofartificiallyweath-eredlatexsealantsinalow-temperatureenvironment.6.Apparatus6.1T3TemperAlcladAluminumPanels,three,each76by153-mm(3by6-in.)of16to24gage(1.29to0.511mm).6.2AcceleratedWeatheringDevice—OneoftheunitsasdescribedinPracticeC1442.BecauseofdifferencesinspectralpowerdistributionsoftheexposuresourcesandexposureparametersusedinthedifferenttypesofdevicesdescribedinPracticeC1442,testresultsmaydifferwiththetypeofacceleratedweatheringdevice.Choiceoftypeofdeviceshallbebymut...
