ASTM D7538 - 09(2013)

    Standard Practice for Evaluating the Water Wash-Off Resistance of Traffic Paints Using an Atomizing Spray Device

    Active Standard ASTM D7538 | Developed by Subcommittee: D01.44

    Book of Standards Volume: 06.02


      Format Pages Price  
    PDF Version 3 $37.00   ADD TO CART
    Print Version 3 $37.00   ADD TO CART


    Significance and Use

    5.1  After waterborne traffic paints are applied to a road pavement, it is important that they be sufficiently coalesced or cured so they will not be removed by rain. This practice can be used to determine the relative water wash-off resistance of waterborne traffic paints when exposed to a water spray simulated rain.

    1. Scope

    1.1 A newly applied traffic paint film may be exposed to rain of varying intensities shortly after application. Practice D7377 describes a practice for evaluating the water wash-off resistance of traffic paints to a hard rain using a steady stream of water from a faucet at a rate of approximately 5.7 L per min. Practice D7538 is a similar practice that describes the use of an adjustable nozzle atomizing spray device to deliver a spray of water that simulates rain rates from approximately 0.05 to 0.5 L per min. This test can be used to compare conventional and fast-dry traffic paints for their relative ability to withstand rain soon after application on roadway surfaces.

    1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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 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

    D562 Test Method for Consistency of Paints Measuring Krebs Unit (KU) Viscosity Using a Stormer-Type Viscometer

    D711 Test Method for No-Pick-Up Time of Traffic Paint

    D823 Practices for Producing Films of Uniform Thickness of Paint, Varnish, and Related Products on Test Panels

    D1005 Test Method for Measurement of Dry-Film Thickness of Organic Coatings Using Micrometers

    D1212 Test Methods for Measurement of Wet Film Thickness of Organic Coatings

    D3924 Specification for Environment for Conditioning and Testing Paint, Varnish, Lacquer, and Related Materials

    D4414 Practice for Measurement of Wet Film Thickness by Notch Gages

    D7377 Practice for Evaluating the Water Wash-Off Resistance of Traffic Paints using a Water Faucet


    ICS Code

    ICS Number Code 93.080.20 (Road construction materials)

    UNSPSC Code

    UNSPSC Code 31211502(Water based paints)


    DOI: 10.1520/D7538

    ASTM International is a member of CrossRef.

    ASTM D7538

    Citing ASTM Standards
    Back to Top