Waterproofing laminate with integral release coating.

摘要

The present waterproofing laminates comprise a flexible sheet-like polymeric support having a first major side thereof coated with a release coating which is substantially non-adherent to bituminous compositions and having a second major side thereof coated with a flexible membrane layer of an adhesive bituminous composition, wherein said release coating can be removed with wet abrasion. These laminates can be formed into rolls for shipment without the need for a large release paper layer over the bituminous adhesive layer. The present invention also relates to a novel method of forming tight overlap seams between the adjacent layers of the present laminates. The method involves washing the first applied layer with a wet abrasion before applying an upper overlapping laminate.