Old building leakage Open Terrace brush bond waterproof Coating in thillai nagar Rvs water proofing construction chemical application It is a bituminous, SBS and special additives content, highly flexible, self-adhesive and long-lasting waterproofing membrane with fiberglass or non-woven spunbond polyester felt that one side is covered with polyethylene film and other side has peelable polypropylene.