DEHCO 16-5825 Tape This trimmable butyl is an off-white, non-hardening elastic butyl based material It provides excellent sealing adhesion to any type of metal, wood, concrete, glass, plastics and porous surfaces Can be used under moldings; around windows, doors and vents It can be trimmed easily with any stiff, pointed non-scratching object Off-White, 1/8" x 1" x 30 feet