FiberFlex Plastic Welding Rod, Flat Ribbon, 30 ft., Black Formulated with carbon and glass fibers for the strongest, fastest repairs; in many cases eliminating the need for wire mesh re-enforcement Sticks to any kind of plastic, but works especially well on TPO's Cool it off and sand immediately to a fine feather edge For use with Polyvance Airless Plastic Welder For use with Polyvance Airless Plastic Welder