A thermoplastic polyolefin based for superior strength and weatherability. More product on the top of the scrim where you need it most, one of the thickest top plies in the industry. Our reinforced membranes offer watertight integrity you can count on. Mule-Hide TPO is CRRC rated and Energy Star listed. TPO has the weathering capability of EPDM with the superior seam strength of heat weldable membranes.