Established in 1985, Flex Roofing Systems (Flex Membrane International Corp.) pioneered the manufacturing of modified PVC single ply roofing membranes incorporating DuPont™ Elvaloy® KEE, a unique plasticizer that keeps the material indefinitely flexible, while making it highly resistant to environmental and temperature extremes and exposure to a wide range of chemicals and pollutants. When it comes to thermoplastic single ply membrane roofing systems, Flex is the expert of choice for architects, contractors, and specifiers who won’t settle for anything but the highest industry standards.