Goof Proof Shower Goof Proof Waterproofing Sheet Membrane Underlayment Seam Tape 5 in. x 39 ft. 5 in. x 20mil GPST-5 in.x 39 ft. 5 in. - The Home Depot
Amazon.com: Vapor Barrier Seam Tape, Moisture Barrier Seam and Seal Adhesive for Crawl Space Encapsulations, Carpet Padding, Underlayment or Marine Use, Waterproof 9 Mil (4 Inches x 180 Feet, White, 12 Pack) :