EverGuard TPO single-ply roofing system preformed accessories provide roofing contractors an easy-to install, factory-built detail. EverGuard TPO preformed accessories are constructed from GAF's proven durable EverGuard TPO single-ply reinforced membrane. EverGuard TPO Split Pipe Boots are constructed from EverGuard reinforced 45 mil membranes. Since they are split, they can be wrapped around pipes and conduit where closed boots cannot be used.