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  • ASTM
    C1878-19 Standard Test Method for Surface Water Resistance of Vapor Retarders for Thermal Insulation
    Edition: 2019
    $76.13
    Unlimited Users per year

Description of ASTM-C1878 2019

ASTM C1878-19

Active Standard: Standard Test Method for Surface Water Resistance of Vapor Retarders for Thermal Insulation




ASTM C1878

Scope

1.1 This test method details a procedure for the determination of the surface water resistance of a vapor retarder by measurement of the quantity of water absorbed in a specified time by the service-exposed surface of a vapor retarder intended for use on thermal insulation.

1.2 This test method covers vapor retarders that are expected to withstand intermittent or occasional exposure to liquid water on the exposed side. Examples of this exposure are condensation and light rain during installation before a structure is enclosed.

1.3 This method does not cover vapor retarders intended for exposure to the elements in outdoor applications.

1.4 This method does not cover thermal insulation products that also act as vapor retarders, such as elastomeric foam and cellular glass.

1.5 In the test, the specimen is exposed to a specified volume of water over a given exposure area, with a resultant head pressure.

1.6 The test method is based on Test Method D3285 (withdrawn), the so-called “Cobb” test used for paper.

1.7 The values stated in SI units are to be regarded as standard.

1.8 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.

1.9 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.


Keywords

Cobb test; surface water resistance;


ICS Code

ICS Number Code 91.100.50 (Binders. Sealing materials)


DOI: 10.1520/C1878-19

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About ASTM

ASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide.

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