Acrylabs Butyl Tape seals out air and moisture at seams on metal roofs. Additionally, it works in homes, sunrooms, rooftops, basements, recreation vehicles and more. Compared with asphalt tapes, Acrylabs Butyl can be applied in a wider temperature range and has a higher peel strength. Butyl tape self-seals around fasteners and will not melt or stain like asphalt-based flashing tapes. Installation is cleaner, more watertight, and will last longer.