Sure-Flex PVC FRS is an advanced-formula, heat-weldable PVC membrane used exclusively in fully adhered applications that utilize liquid applied bonding adhesives, designed to provide performance and long-term weather ability , thick PVC-based top and bottom plies encapsulate the membrane's internal fiberglass reinforcement, enhancing dimensional stability. All PVC FRS membranes are manufactured to exceed minimum thickness specifications. The membrane's smooth surface facilitates a permanent weld for a consistent, watertight, monolithic roof assembly.