what does fpo membrane
FPO membranes have been used in civil engineering since the Seventies and as a waterproofing system on roofs since the beginning of the Eighties. Halogen-and plasticizer-free PIB roofing membranes have been in use as waterproofing for roofs since 1953.hese bitumen-compatible roofing and waterproofing membranes are weldable. The first patents for making polyethylene flexible with the aid of vinyl acetate go back to 1938. The reverse approach has since proved better, with vinyl acetate being modified with PVC since 1971.