Fusion-Tech UV is the first available fusible polypropylene pipe to be made with built in UV protection. This pipe is made with the highest quality polypropylene. The outer layer is composed of PP-R Super 80, for optimal impact resistance. The middle layer, known as the Faser layer, is reinforced with fibers to minimize thermal expansion. The inner layer is composed of the most advanced available resin PP-RCT 125, for maximum temperature and pressure handling capabilities.