US 5,204,148 AGranted

Laminate cover and method for sealing a roofing membrane

AssigneeBridgestone/Firestone, Inc.

InventorsBrian S. Alexander, Daniel L. Barksdale

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Abstract

A laminate cover for sealing an opening in a weatherproof roofing membrane includes a top sheet of a weather resistant material, preferably an uncured butyl rubber EPDM material, and a complementary shaped and sized lower sheet of a lightly cured butyl rubber having opposed tacky surfaces. A layer of a flowable sealing material such as an uncured butyl rubber sealing compound having a smaller dimension than that of the lower sheet, is trapped between the lower sheet and a bottom release coated carrier. Upon removal of the carrier, the cover is pressed over the opening to be sealed and an exposed peripheral tacky area of the lower sheet secures the cover to the membrane and traps the sealing compound therein. Applied or ambient heat will cause the sealing compound to flow into the opening to effectively seal the same, and will vulcanize the top sheet to provide abrasion and weather resistance for the cover.

Claims11

Dependent claims

A flexible laminate cover for sealing a roofing membrane including:

a) a release coated carrier having a peripheral border;
b) a layer of uncured elastomeric sealing material located within the peripheral border of the carrier adapted to be positioned in contact with an area of a roofing membrane to be sealed thereby after removal of the carrier from said layer of sealing material;
c) a first sheet of a dimensionally stable tacky elastomeric material mounted on the carrier and having an exposed pressure sensitive peripheral border extending beyond the layer of sealing material in order to adhere to the roofing membrane after the release coated carrier has been removed form the first sheet and sealing material, and to trap said layer of sealing material within the peripheral border of said first sheet after said first sheet and sealing material have been placed in contact with the roofing membrane;
and
d) a second flexible sheet of a weather resistant material permanently secured to the first sheet to provide physical protection to said first sheet and to said layer of sealing material after said first sheet and said sealing member have been placed in contact with the roofing membrane.

2 more elements

Dependencies are inferred from the claim text.