ASTM_C_603_-_14.pdf

Designation:C60314Standard Test Method forExtrusion Rate and Application Life of ElastomericSealants1This standard is issued under the fixed designation C603;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.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope1.1 This test method covers two laboratory procedures fordetermining the extrusion rate and application life(or“potlife”)of elastomeric chemically curing sealants for use inbuilding construction.NOTE1These sealants are supplied with various rheological proper-ties ranging from pourable liquids to nonsagging pastes.Single-component sealants are supplied ready for use upon opening the container,and their rate of cure is determined by the climatic conditions to whichthey are exposed.Multicomponent sealants are supplied as a basecomponent and a curing agent separately packaged.After mixing the twoparts,the sealant is ready for application,and curing begins immediately.1.2 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are provided forinformation only.1.3 There is no known ISO equivalent to this test method.1.4 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.2.Referenced Documents2.1 ASTM Standards:2C717 Terminology of Building Seals and Sealants3.Terminology3.1 Refer to Terminology C717 for definitions of the fol-lowing terms used in this standard:standard conditions.4.Significance and Use4.1 The results obtained by this test method are simply ameasure of the time required to extrude a known volume ofsealant through a known orifice under a predetermined pres-sure.4.2 This test method is not considered a measure of curerate.5.Apparatus5.1 Caulking Gun,177-mL(6-floz)capacity,air-powered.5.2 Polyethylene Cartridge,177-mL(6-floz),with the frontend having an inside diameter of 13.7 6 0.05 mm(0.540 60.002 in.).5.3 Air Supply,providing 345 kPa(50-psi)pressure andhaving the necessary connection fittings for attachment to theair-powered caulking gun.5.4 Timing Device(clock or watch),calibrated in seconds.5.5 500-mL(1-pt)Container6.Procedure6.1 Extrusion Rate of Single-Component SealantFirstcondition the unopened container for at least 16 h at standardconditions.Then place a sufficient amount of sealant into the177-mL(6-floz)cartridge to fill it completely with the plungerin place,fully retracted.Using no nozzle on the cartridge,gunthe sealant at 345 kPa(50-psi)pressure into the 500-mL(1-pt)container,measuring the time in seconds required to empty thecartridge.NOTE2When the printed instructions of the sealant manufacturer sorecommended,heat the sealant before extruding it into the container.6.2 Extrusion Rate or Application Life or both,of MixedMulticomponent SealantFirst condition the unopened con-tainers of both sealant and curing agent for at least 16 h atstandard conditions.Then mix 400 g of the sealant with theproper amount of curing agent,stirring the mixture by hand for5 min.Place a sufficient amount of the mixed compound intothe 177-mL(6-floz)cartridge to fill it completely with theplunger in place,fully retracted,and set the filled cartridgeaside,in a vertical position,at standard conditions,for 3 h1This test method is under the jurisdiction ofASTM Committee C24 on BuildingSeals and Sealants and is the direct responsibility of Subcommittee C24.20 onGeneral Test Methods.Current edition approved June 1,2014.Published July 2014.Originally approvedin 1969.Last previous edition approved in 2008 as C603-04(2008).DOI:10.1520/C0603-14.2For 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(Note 3).Then,using no nozzle on the cartridge,gun thesealant at 345 kPa(50-psi)pressure into the 500-mL(1-pt)container,measuring the time in seconds required to empty thecartridge.NOTE3Curing times and conditions for multi-component mixedcompounds may vary.Therefore curing periods of longer or shorter than3 h,and under other than the specified standard conditions,or either oneof these two may be specified in some cases.7.Report7.1 The report on the extrusion rate of the single-componentsealant shall state:7.1.1 The trade name(or other identification)of the sealant.7.1.2 The time,in seconds,required to empty the cartridge(the extrusion rate),and7.