Blueskin PreSeal™ 435 is a pre-applied, fully, and permanently bonded composite sheet membrane for commercial foundation waterproofing applications. The membrane contains an adhesive and provides for mechanical attachment into wet concrete to form a permanent barrier seal. Blueskin PreSeal 435 consists of a polypropylene membrane laminated to a chemically enhanced non-woven geotextile fleece with a dimpled surface. Blueskin PreSeal 435 is pre-applied prior to rebar installation and concrete placement.