ASTM D8138 - 18

    Standard Specification for Preformed Silicone Joint Sealing System for Bridges

    Active Standard ASTM D8138 | Developed by Subcommittee: D04.32

    Book of Standards Volume: 04.03


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    1. Scope

    1.1 This specification covers the material requirements for preformed silicone joint seals for bridges. The seal consists of a silicone rubber gland preformed to a continuous length. Its design shall prevent any tension from occurring in the seal or bonding point during normal movement. The seal is installed by bonding it to the joint header with a silicone-based adhesive and is designed to seal the joint, preventing liquid intrusion.

    1.2 The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

    1.3 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

    1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.


    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

    C639 Test Method for Rheological (Flow) Properties of Elastomeric Sealants

    C679 Test Method for Tack-Free Time of Elastomeric Sealants

    C793 Test Method for Effects of Laboratory Accelerated Weathering on Elastomeric Joint Sealants

    D395 Test Methods for Rubber PropertyCompression Set

    D412 Test Methods for Vulcanized Rubber and Thermoplastic ElastomersTension

    D573 Test Method for RubberDeterioration in an Air Oven

    D624 Test Method for Tear Strength of Conventional Vulcanized Rubber and Thermoplastic Elastomers

    D2240 Test Method for Rubber PropertyDurometer Hardness


    ICS Code

    ICS Number Code 91.100.50 (Binders. Sealing materials)

    UNSPSC Code

    UNSPSC Code 31133710(Silicone sealant)


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

    DOI: 10.1520/D8138-18

    Citation Format

    ASTM D8138-18, Standard Specification for Preformed Silicone Joint Sealing System for Bridges, ASTM International, West Conshohocken, PA, 2018, www.astm.org

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