Peel-Bak Adhesive Neoprene Sponge Weatherstrip A light-weight closed cell sponge material, Peel-Bak is an easy to apply type of weatherstrip for auto and household use. May also be used on boats, refrigerators or any place a weatherproof, permanent seal is required. Simple to use - just peel back the liner tape and press into place. No cement or tacking required. Surface must be clean and dry.