Flexidine HDPE PSR is a high performance, flexible High-Density Polyethylene (HDPE) sheet with pre-applied pressure sensitive adhesive and release liner on one side, manufactured & supplied in specified thickness, designed for underground basement waterproofing and other building structures. Flexidine HDPE PSR membrane is modified for excellent puncture resistance and mechanical properties to withstand backfill and cuts, while maintaining its integrity and continuing to provide protection from water seepage. The sheets are pre-applied with pressure sensitive adhesive and release liner for quick installation. The pressure sensitive layer allows poured concrete to form an integral bond with the membrane and holds the membrane in place if settlement of substrate occurs. As the mass of the structural concrete increases during the concrete pour, the adhesive is activated and forms a continuous bond with the concrete poured against it. The release liner applied is easy to remove and apply the membrane on the substrate making the installation work quick. The laps are sealed with a seam tape as required. Flexidine HDPE PSR membrane provides water & water vapour protection to water excluding structures and protects concrete from aggressive ground salts, chemicals and hydrocarbons. The sheets are available in white color in 1.2 mm thickness with 1.2 mtr width, complying to ASTM and EN standards.