Single-sided 7-layer gas barrier tape with release liner 4" X 160'. Backing contains a highly impermeable layer designed to block migration of radon, methane and VOCs. Aggressive acrylic adhesive provides outstanding adhesion to polyethylene over wide temperature range. Typical uses include joining, repairing and sealing gas/moisture barriers Vaporseal Tape - Single-Sided 7-Layer Gas Barrier Tape 4"x160' - TVSP4