Black Tear Proof Tape Designed for use with ordinary construction vapor barrier to seal off work zones and gardening areas. This adhesive-backed zipper is perfect for creating a simple, resealable access doorway. It installs in minutes without special tools and will permanently bond to any clean plastic sheeting. The 84 in long, heavy-duty, waterproof #5 zipper is sewn to a 950-denier high-density polyethylene backing that has a permanent high-tack acrylic adhesive. Keeps dust, water and light out.