Crack-bridging flexible sheet waterproofing membrane, made out of a highly tear-resistant polyethylene foil and laminated with a polypropylene non-woven on it’s both sides. SCHÖNOX WSF is recommended for waterproofing membrane installation in private and public wet areas under ceramic tiles. SCHÖNOX WSF is characterized by very easy installation and very low internal tensions. Laminated polypropylene non-woven of SCHÖNOX WSF ensures very good tensile adhesion while bonding it to the substrate and while adhering ceramic tiles on top. Approved according ETAG 022. For interior use.