NaturaSeal Fabric Tape is an easy to use economical and permanent sealing tape that bonds to most materials, including roofing membranes, metals, and plastics. This tape uses an elastomeric adhesive bonded to a woven polyester fabric backing for maximum conformability. NS-FBT can be used to seal leaking joints, seams, and cracks. It is designed to expand and contract without any cracking. NS-FBT is not designed for direct exposure to UV, but can be coated or painted with a UV resistant coating.