3M™ VentureClad™ Heavy Duty Insulation Jacketing Tape 1579GCW is a 15.0 mil heavy duty multi-layered laminate coated with an aggressive cold weather pressure sensitive acrylic adhesive. It is excellent as a vapor barrier for insulation cladding and jacketing applications requiring reinforced protection. It is designed specifically to protect insulation, allowing the system to perform at its best.