Heng's Off White 1" x 30' Roll Butyl Roof Repair Tape 5825 13-0882

It is used to seal & waterproof under moldings, windows, doors & vents, overlapping metals. It is 1/8 inch thick x 1 inch width. It is non-hardening, tough, butyl elastic material has an excellent sealing properties to metal, glass and plastic lap points.