ASTM WK72017

    New Specification for Flexible Protective Jackets made of Modified Asphalt / Butyl Rubber for Use over Thermal Insulation

    (What is a Work Item?)

    Developed by Subcommittee: C16.40 | Committee C16 | Contact Staff Manager


    1. Scope

    1.1.This specification addresses flexible protective jackets, made of modified asphalt or butyl rubber, for use over thermal insulation. Typical applications are insulated ducts, pipe, and equipment. Some of these materials can be used outdoors but some are limited to use indoors in unoccupied spaces. Some can also be used for direct burial applications. None of these materials are intended for use indoors in occupied spaces. 1.2.This jacket material covered by this specification can be used on insulation with exterior surface temperatures from a low of -40F (-40C) to a high of 240F (116C). Limits on installation temperatures may not be the same as these values. 1.3.While similar in end use and performance to laminate protective jacket, the jacket material covered by this current specification has a different composition. See Specification C1775 for laminate protective jacket and tape. 1.4.While this jacket material has a low to very low water vapor permeance, it is not always used on below ambient applications. It can be used on both above ambient and below ambient applications. 1.5.This specification does not address installation methods of this jacketing material. 1.6.The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.7.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.


    protective jackets:flexible jackets:modified asphalt:butyl rubber


    This category of protective jackets are widely available in the marketplace and hence need an ASTM specification.

    The title and scope are in draft form and are under development within this ASTM Committee.

    Citing ASTM Standards
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    Work Item Status

    Date Initiated:

    Technical Contact:
    Gordon Hart

    Draft Under Development