Specialty butyl mastic foil tape, high tack, low VOC 17 mil aluminum ‘mastic’ foil tape coated with a pressure-sensitive, modified butyl rubber adhesive. Provides an instant waterproof grip to a variety of surfaces and a full bond in 24 hours. Features a release liner for ease of use and has excellent flexibility with no cracking. ALF Mastic is a LEED points contributor. Highly resistant to the effects of weather, UV, temperature, mold and mildew. Paintable.