EverGuard Universal Corners accommodate both inside and outside corners of base and curb flashings. Simply cut at markings to produce either an inside or outside corner reinforcement. EverGuard® PVC single-ply roofing system molded accessories provide roofing contractors an easy-to-install, factory-built detail. EverGuard® molded accessories are manufactured using a proprietary formulation designed for use with GAF's EverGuard® PVC single-ply membranes.