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    ASTM D2148 - 19e1

    Standard Test Methods for Bondable Silicone Rubber Tapes Used for Electrical Insulation

    Active Standard ASTM D2148 | Developed by Subcommittee: D09.07

    Book of Standards Volume: 10.01

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    Significance and Use

    5.1 Self-adhesion is a primary initial property since it affects layer-to-layer bonding. The integrity of the bond can significantly affect the electrical and physical performance of the insulation system. Therefore, the degree of self-adhesion is directly related to apparatus performance.

    5.2 A high degree of self-adhesion is desirable for most electrical applications. In this test, a short unwinding length indicates a high degree of self-adhesion.

    5.3 This test method has been found useful as a quality control test for lot acceptance.

    1. Scope

    1.1 These test methods cover tests for bondable silicone rubber tapes which form a sealed structure either with the application of heat (and pressure if needed) or by the process of auto-adhesion (self-fusing).

    1.2 These test methods appear in the following sections:

         Test Method





    3 – 10

         Bond Strength

    11 – 18

         Dielectric Breakdown Voltage

    19 – 26




    33 and 34


    27 – 32


    36 – 40

    1.3 Units—The values stated in SI units are the standard. The inch-pound units in parentheses are for information only. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.

    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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For a specific hazard statement see 23.1.1.

    1.5 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

    D149 Test Method for Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials at Commercial Power Frequencies

    D374/D374M Test Methods for Thickness of Solid Electrical Insulation

    D618 Practice for Conditioning Plastics for Testing

    D1000 Test Methods for Pressure-Sensitive Adhesive-Coated Tapes Used for Electrical and Electronic Applications

    D1458 Test Methods for Fully Cured Silicone Rubber-Coated Glass Fabric and Tapes for Electrical Insulation

    D2240 Test Method for Rubber PropertyDurometer Hardness

    ICS Code

    ICS Number Code 29.035.20 (Plastic and rubber insulating materials)

    UNSPSC Code

    UNSPSC Code 31201502(Electrical insulating tape)

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

    DOI: 10.1520/D2148-19E01

    Citation Format

    ASTM D2148-19e1, Standard Test Methods for Bondable Silicone Rubber Tapes Used for Electrical Insulation, ASTM International, West Conshohocken, PA, 2019, www.astm.org

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