Designation:C732−17StandardTestMethodforAgingEffectsofArtificialWeatheringonLatexSealants1ThisstandardisissuedunderthefixeddesignationC732;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thistestmethodcoversalaboratoryprocedureforthedeterminationofagingeffectsofartificialweatheringonlatexsealants.1.2Thevaluesstatedinmetric(SI)unitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.NOTE1—CurrentlythereisnoISOstandardsimilartothistestmethod.2.ReferencedDocuments2.1ASTMStandards:2C717TerminologyofBuildingSealsandSealantsC1442PracticeforConductingTestsonSealantsUsingArtificialWeatheringApparatus3.Terminology3.1Definitions:3.1.1DefinitionsofthefollowingtermsarefoundinTer-minologyC717:adhesivefailure(lossofadhesion);latexsealant;sealant,standardconditions.4.SummaryofTestMethod4.1Thesealantisplacedinaspeciallyconstructedwood-and-aluminumfixture(referredtoasa“channelpanel”)andexposedforintervalsof500htospecifiedalternatewetanddrycyclesinanacceleratedweatheringunit,thenperiodicallyexaminedforevidencesofdeterioration.5.SignificanceandUse5.1Acceleratedweatheringexposureservestoindicatelong-termexteriordurabilityofthesealant.Inthistestmethod,durabilityistestedwhenthesealantisusedwithwoodoraluminum.6.Apparatus6.1AcceleratedWeatheringDevice—OneoftheunitsasdescribedinPracticeC1442.BecauseofdifferencesinspectralpowerdistributionsoftheexposuresourcesandexposureparametersusedinthedifferenttypesofdevicesdescribedinPracticeC1442...
