ASTM D4990-97a(2005)e1
- Standard Specification for Coal Tar Glass Felt Used in Roofing and Waterproofing
- standard by ASTM International, 03/01/2005
- Publisher: ASTM
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1.1 This specification covers glass felt impregnated with coal tar intended to be used with coal tar pitch conforming to the appropriate requirements of Specification D 450 in construction of built-up roofs and in the construction waterproofing systems.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.