Waterproofing laminate
AssigneeW. R. Grace & Co.
InventorRobert F. Stierli
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Abstract
An improved pre-formed, sheet-like flexible laminate suitable for waterproofing of structural surfaces, the sheet-like material having a laminate structure of (a) a flexible waterproof and waterproofing bituminous membrane and (b) a support sheet material covering at least one major surface of the bituminous membrane; an oil-impermeable polymeric coating being provided between said support sheet material and the adjacent surface of the bituminous membrane to protect the support sheet from adverse effects of oil present in the bituminous membrane.
Claims8
An improved pre-formed, sheet-like flexible laminate for waterproofing structural surfaces, said laminate being comprised of (a) a flexible waterproof and waterproofing bituminous membrane having oil therein;
- (b) a flexible non oil-resistant polymeric support sheet for said membrane non-removably adhered thereto and covering at least one major surface of said membrane;
- and (c) intermediate said bituminous membrane and said support sheet, an oil resistant and oil-impermeable barrier formed by depositing a coating of an oil-resistant polymer to said sheet and/or said membrane, whereby oil present in said bituminous membrane is prevented from substantially contacting said polymeric sheet.
Dependencies are inferred from the claim text.