EverGuard® TPO single-ply roofing system molded accessories provide roofing contractors an easy-to-install, factory-built detail. Its molded accessories are manufactured using a proprietary formulation designed for use with GAF's EverGuard® TPO single-ply membranes. EverGuard® Vent Boots are molded from a proprietary TPO formulation engineered to work with EverGuard® TPO single-ply membranes.