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
BURmastic® Glass Ply-28 lb. consists of a fiberglass membrane coated with waterproofing asphalts.
BURmastic Glass Ply-28 lb. is designed for application as a ply sheet in cold-applied built-up roof systems over preformed rigid insulation and/or base sheets. BURmastic Glass Ply-28 lb. can also be used as a hot or cold applied base sheet. BURmastic Glass Ply-28 lb. exceeds ASTM D 4601-91, Type II. Refer to UL Roofing Materials and Systems Directory and/or FM Approvals RoofNav for applicable system configurations.
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