Heng's Off White 1/2" x 30' Roll Butyl Roof Repair Tape 5828 13-0880

Used to seal & waterproof under moldings, windows, doors & vents, overlapping metals. It is 1/8 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.