ASTM_C_1518_-_16.pdf

Designation:C151816Standard Specification forPrecured Elastomeric Silicone Joint Sealants1This standard is issued under the fixed designation C1518;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 Precured elastomeric silicone joint sealants,hereinafterreferred to as seal,are manufactured in flat,cured,extrudedshapes and are primarily used to span joint openings inconstruction.This specification describes the properties ofapplied,flat shaped precured elastomeric silicone jointsealants,hereinafter referred to as applied seal,that bridge jointopenings and are adhered to joint substrates utilizing a liquidappliedsiliconeadhesivesealant,specifiedbythemanufacturer,hereinafter referred to as adhesive to construc-tion substrates,to seal building openings such as panel joints,metal flashing joints,or other building openings in place ofconventional liquid applied sealants.1.2 Seals are applied in three different configurations:1.2.1 As a bridge joint,the seal is applied flat on the surfaceto cover a joint opening.See Fig.1.1.2.2 As a beveled bridge joint,the seal is applied on thebeveled edge of a substrate to bridge a joint opening.See Fig.2.1.2.3 As a U-joint,the seal is applied in a U-configurationwithin a joint.See Fig.3.1.3 This specification is for a flat extruded shape.A three-dimensional shape used at a joint cross section or terminationis being considered for future inclusion in the specification.1.4 An applied seal meeting the requirements of this speci-fication shall be designated by the manufacturer as to move-ment class and tear class as described in Section 5.1.5 The values stated in SI units are to be regarded as thestandard.The values given in brackets are for information only.2.Referenced Documents2.1 ASTM Standards:2C717 Terminology of Building Seals and SealantsC1442 Practice for Conducting Tests on Sealants UsingArtificial Weathering ApparatusC1523 Test Method for Determining Modulus,Tear andAdhesion Properties of Precured Elastomeric Joint Seal-antsD1566 Terminology Relating to RubberG113 Terminology Relating to Natural and Artificial Weath-ering Tests of Nonmetallic Materials3.Terminology3.1 Definitions:3.1.1 Refer to Terminology C717 for definitions of termsused in this standard,including but not limited to the follow-ing:cohesive failure,adhesive failure,elastomeric,elongation,joint,modulus,primer,seal,sealant,shelf-life,substrate.3.1.2 Refer to Terminology G113 for definitions related toartificial weathering.3.1.3 Refer to Terminology D1566 for tear.4.Significance and Use4.1 This specification describes several classifications ofapplied seals as described in Section 5.The purchaser or designprofessional shall recognize that not all materials meeting thisspecification are suitable for all applications and substrates.Itis essential,therefore,that the proper classification of the sealsystem is provided for the intended use.The test methods inthis specification relate to elastomeric performance,adhesionof the adhesive to the seal and adhesion of the adhesive to thesubstrate,only as adhesion relates to the test specimens.Thestandard substrate for qualification to this specification isportland cement mortar.The standard joint configuration forqualification to this specification is the bridge joint configura-tion as shown in Fig.1.Users are advised to have adhesiontests performed in the field on the actual substrate to determineadhesion performance.NOTE1Other joint configurations such as beveled bridge jointapplication and/or U-joint application in place or in addition to thestandard joint configuration may be specified for the test with the appliedseal sample.NOTE2Other substrates such as EIFS,brick,wood,aluminum,plastic,metal or other in place or in addition to the standard substrate maybe specified for the test with the applied seal sample.5.Classification5.1 Movement ClassA seal qualifying under this specifi-cation shall be classified for movement capability as follows.1This specification is under the jurisdiction of ASTM Committee C24 onBuilding Seals and Sealants and is the direct responsibility of Subcommittee C24.10on Specifications,Guides and Practices.Current edition approved June 1,2016.Published July 2016.Originally approvedin 2002.Last previous edition approved in 2014 as C1518-04(2014).DOI:10.1520/C1518-16.2For 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 5.1.1 Movement Class XAn applied seal that when testedfor movement as described in Test Meth