ASTM D4946 - 89(2012)

    Standard Test Method for Blocking Resistance of Architectural Paints

    Active Standard ASTM D4946 | Developed by Subcommittee: D01.42

    Book of Standards Volume: 06.02


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    Significance and Use

    5.1 Dry paint often comes in contact with itself especially in window and door areas and, depending on its hardness, the pressure, temperature, humidity, and duration of time the surfaces are in contact, sometimes sticks to itself (blocks). This stringent test method can be used to compare and rate subjectively the resistance of paints to blocking.

    1. Scope

    1.1 This test method covers an accelerated procedure for evaluating the face-to-face blocking resistance of trades sales paints. This is not to be confused with blocking resistance Test Method D3003, which is concerned with blocking of industrial coatings on metal substrates, nor with Test Method D2793 which is concerned specifically with wood product finishes and reports results on a satisfactory or not satisfactory basis, rather than by the degree of blocking tendency as in this test method.

    1.2 The values stated in the SI units of measurement are to be regarded as the standard. The values given in parentheses are for information only.

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


    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

    D16 Terminology for Paint, Related Coatings, Materials, and Applications

    D2793 Test Method for Block Resistance of Organic Coatings on Wood Panel Substrates

    D3003 Test Method for Pressure Mottling and Blocking Resistance of Organic Coatings on Metal Substrates


    ICS Code

    ICS Number Code 87.040 (Paints and varnishes)

    UNSPSC Code

    UNSPSC Code 31211500(Paints and primers)


    Referencing This Standard

    DOI: 10.1520/D4946-89R12

    ASTM International is a member of CrossRef.

    Citation Format

    ASTM D4946-89(2012), Standard Test Method for Blocking Resistance of Architectural Paints, ASTM International, West Conshohocken, PA, 2012, www.astm.org

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