Polybit Bitustick 15 Self Adhesive HDPE Membrane is a self-adhesive HDPE membrane that is used to protect and reinforce various types of structures. It is a lightweight, flexible, and waterproof membrane that is made from HDPE (High Density Polyethylene) and is available in various thicknesses. The membrane is designed to be used in a variety of applications, including roofing, cladding, and wall cladding.