ASTM_C_834_-_17.pdf

Designation:C83417Standard Specification forLatex Sealants1This standard is issued under the fixed designation C834;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 specification covers one component latex sealantsused for sealing joints in building construction.1.2 A sealant meeting the requirements of this specificationshall be classified by the manufacturer to be one of the typesand grades defined in Section 4.1.3 The values stated in SI units are to be regarded as thestandard.The inch-pound in parenthesis are provided forinformation purposes only.1.4 The following precautionary caveat pertains only to thetest method portion,Section 10,of this Specification:Thisstandard does not purport to address all of the safety concerns,if any,associated with its use.It is the responsibility of the userof this standard to establish appropriate safety and healthpractices and determine the applicability of regulatory limita-tions prior to use.NOTE1Currently,there is no ISO standard similar to this specifica-tion.2.Referenced Documents2.1 ASTM Standards:2C717 Terminology of Building Seals and SealantsC732 Test Method forAging Effects ofArtificial Weatheringon Latex SealantsC734 Test Method for Low-Temperature Flexibility of LatexSealants After Artificial WeatheringC736 Test Method for Extension-Recovery and Adhesion ofLatex SealantsC1183 Test Method for Extrusion Rate of Elastomeric Seal-antsC1193 Guide for Use of Joint SealantsC1241 Test Method for Volume Shrinkage of Latex SealantsDuring CureD2202 Test Method for Slump of SealantsD2203 Test Method for Staining from SealantsD2377 Test Method for Tack-Free Time of Caulking Com-pounds and Sealants3.Terminology3.1 DefinitionsDefinitions of the following terms apply tothis specification and are found in Terminology C717:adhesivefailure(adhesion loss),cure,joint,latex sealant,sealant,shrinkage(volume),standard conditions,and substrate.4.Classification of Sealants4.1 A sealant qualifying under this specification shall beclassified by type and grade as follows:4.1.1 Type OPAn opaque sealant containing color pig-ments or extender pigments,or both,that has no more than30%volume shrinkage(see 10.1.3).4.1.2 Type CA clear or translucent sealant that has nomore than 50%volume shrinkage(see 10.1.3).4.1.3 Grade 18CA sealant that meets the requirementsfor low temperature flexibility(see 7.1)when tested at 18C(0F).4.1.4 Grade 0CA sealant that meets the requirements forlow temperature flexibility(see 7.1)when tested at 0C(32F).4.1.5 Grade NFA sealant that does not meet the require-ments for low temperature flexibility of Grade 0C(see 4.1.4).5.Materials and Manufacture5.1 The sealant shall be composed of latex formulated withappropriate fillers,pigments,and chemical additives to result inconformance to this specification.5.2 All material and workmanship shall be in accordancewith good commercial practice.The producer is permitted awide latitude in choice of raw materials for making theseproducts.Consequently,there is no implication that the com-pounds are equivalent in all physical properties.5.3 The manufacturing process shall be such as will ensurea homogeneous mix,free of defects that would affectserviceability,and provide a consistency suitable for immedi-ate application.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 March 1,2017.Published March 2017.Originallyapproved in 1976.Last previous edition approved in 2014 as C834 14.DOI:10.1520/C0834-17.2For 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 StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 6.General Requirements6.1 The shelf life of this sealant shall be determined by itsmanufacturer.When establishing the shelf life,the manufac-turer should also identify acceptable conditions of storage forthe sealant.6.2 After 21 days cure at standard conditions,the color ofthe sealant shall be that color that has been agreed uponbetween the purchaser and the supplier.6.3 The sealant is inten