ASTM C1635 - 16

    Standard Test Method to Evaluate Adhesion/Cohesion Properties of a Sealant at Fixed Extension

    Active Standard ASTM C1635 | Developed by Subcommittee: C24.30

    Book of Standards Volume: 04.07

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    Significance and Use

    5.1 In any sealant application, the sealant must be capable of maintaining an adhesive bond to the substrate when held in strain for its intended service life.

    5.2 This test method is an indicator of a sealant’s ability to adhere under strain to a given substrate.

    5.3 The default test strain is the movement ability of the sealant as designated by the manufacturer. The default joint configuration is 12.7 × 12.7 × 50.8 mm (1/2 × 1/2 × 2 in.). Other strains and joint configurations may be used and reported as noted in Section 8 and Table 1.

    1. Scope

    1.1 This test method describes a laboratory procedure for measuring the adhesion/cohesion properties of a sealant when subjected to tensile loads resulting from an applied specified strain. The adhesion/cohesion properties are evaluated before, during, and after water immersion.

    1.2 This test method examines the adhesive and cohesive performance of a sealant on a specified substrate at a strain equivalent to a multiple of the strain/movement capability designated by the manufacturer for the given sealant per Specification C920.

    1.3 The values stated in SI (metric) units are to be regarded as the standard. The inch values given in parentheses are for information only.

    1.4 This standard does not purport to address all of the safety concerns, if any associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

    1.5 Comparable Test: 

    1.5.1 ISO 10590, Building construction - Jointing products - Sealants - Determination of adhesion/cohesion properties at maintained extension after immersion in water

    1.5.2 ISO 8340, Building construction - Jointing products - Sealants - Determination of tensile properties at maintained extension

    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    C717 Terminology of Building Seals and Sealants

    C719 Test Method for Adhesion and Cohesion of Elastomeric Joint Sealants Under Cyclic Movement (Hockman Cycle)

    C920 Specification for Elastomeric Joint Sealants

    C1375 Guide for Substrates Used in Testing Building Seals and Sealants

    ICS Code

    ICS Number Code 21.140 (Seals, glands)

    UNSPSC Code

    UNSPSC Code 31200000(Adhesives and sealants)

    Referencing This Standard
    Link Here
    Link to Active (This link will always route to the current Active version of the standard.)

    DOI: 10.1520/C1635-16

    Citation Format

    ASTM C1635-16, Standard Test Method to Evaluate Adhesion/Cohesion Properties of a Sealant at Fixed Extension, ASTM International, West Conshohocken, PA, 2016,

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