Urethane Supply R10-04-03-BK Uni-Weld FiberFlex Rod, Flat Sticks, (3/8” x 1/16”), 30 ft.
FiberFlex is Urethane Supply Company's "Universal" rod. It is not a true fusion weld, though. Instead, the FiberFlex is a hot-melt adhesive that is applied with a plastic welder. So, it is similar to a brazing process. It sticks great to polypropylene and TPO.