Heng's Off White 3/4" x 20' Roll Butyl Roof Repair Tape 5855 69-5226

Used to seal & waterproof under moldings, windows, doors & vents, overlapping metals. It is 3/16 inch thick x 1/2 inch width. It is non-hardening, tough, butyl elastic material has an excellent sealing properties to metal, glass and plastic lap points.