ASTM_C_1367_-_06_2012.pdf

Designation:C136706(Reapproved 2012)Standard Test Method forDead Load Resistance of a Sealant in ElevatedTemperatures1This standard is issued under the fixed designation C1367;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers a laboratory procedure fordetermining the heat resistance of sealants.This test method isconducted under dead load in a shear mode.This test methodwas previously written to include only hot applied sealants.1.2 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are provided forinformation purposes only.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.1.4 The subcommittee with jurisdiction of this standard isnot aware of any similar or equivalent ISO standard.2.Referenced Documents2.1 ASTM Standards:2B209 Specification for Aluminum and Aluminum-AlloySheet and PlateC717 Terminology of Building Seals and SealantsC1036 Specification for Flat GlassC1375 Guide for Substrates Used in Testing Building Sealsand Sealants3.Terminology3.1 DefinitionsDefinitions of the following terms used inthis test method are found in Terminology C717,4.1:adhesivefailure,cohesive failure,hot-applied sealant,sealant,andsubstrate.3.2 Definitions of Terms Specific to This StandardDefinitions of the following terms used in this test method arefound in Terminology C717,4.2:applicator and specifiedtemperature.4.Summary of Test Method4.1 The sealant is placed between glass and aluminumsubstrates.The specimen conditioning time is recorded.Thespecimen is heated in shear mode with a weight suspendedfrom the specimen.The weight applied and the time that ittakes for the specimen to fail is recorded.5.Significance and Use5.1 Sealants are generally subjected to stresses in end-useapplications.This test method measures the heat resistance ofsealants when subjected to dead load shear stresses while underheat.6.Apparatus6.1 Sealant Applicator or Oven,capable of maintaining thesealant within 62.8C(65F)of the specified temperature.6.2 Substrates:6.2.1 Annealed glass that is 25.4 mm wide by 76.2 mm longand 6.35 mm thick(1 in.by 3 in.by 0.25 in.).(SeeSpecification C1036.)6.2.2 Aluminum alloy 5052-H32 that is 25.4 mm wide by76.2 mm long and 0.508 mm thick(1 in.by 3 in.by 0.020 in.).(See Specification B209.)6.2.3 Other substrates may be used when specified(Fig.1).6.3 Template,to provide 3.28-mm(18-in.)sealant thickness(Fig.2).6.4 Hot Knife or Spatula.6.5 Test Oven,capable of maintaining specified temperaturewithin 62.8C(65F).This oven must contain some apparatusfor suspending the specimens in shear mode during testing.Automatic timing devices and recorders may be used to recordthe time it takes for the test specimens to shear apart.7.Sampling7.1 Sealant shall be free of external surface contaminantssuch as talc,oil,dust,and moisture.Handling of the sealantsurfaces in contact with the substrate shall be minimized.1This test method is under the jurisdiction ofASTM Committee C24 on BuildingSeals and Sealants and is the direct responsibility of Subcommittee C24.30 onAdhesion.Current edition approved Jan.1,2012.Published January 2012.Originallyapproved in 1997.Last previous edition approved in 2006 as C136706.DOI:10.1520/C1367-06R12.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 FIG.1 Assembly of Test Sealant on SubstratesNOTE1The template shall be made of a material of low thermalconductivity,such as wood or fiberglass.FIG.2 TemplateC1367 06(2012)2 7.2 Condition not less than 250 g of sealant(and sufficientportion of other components,if a multicomponent)in a closedcontainer for 24 h at 23 6 2C(73.4 6 3.6F)and 50 6 5%relative humidity.8.Test Specimens8.1 Prepare five test specimens from the bulk sample byusing the applicator or oven method.8.1.1 Applicator Method:8.1.1.1 Clean the glass and aluminum surfaces according tothe procedures set forth in Guide C1375.8.1.1.2 Using the appropriate die or nozzle,apply a 25.4 by25.4-mm(1 by 1-in.)layer of sealant onto one end of the glasssurface at a thickness that when compressed will comply with8.1.1.4.All substrates shall be at a temperature of 23 6 2C(73.4 6 3.6F).Apply the sealant at the temperature specifiedby the sealant manufacturer.8.1.1.3 Immediately aft