5-25mm anti-uv sheet of hdpe for Treads-- Cus-to-size HDPE 5-25mm uv resistant pe300 sheet seller-HDPE sheets 4×8 . PE 300 / HDPE sheets High-Density Polyethylene (HDPE) – a linear polymer, High-Density Polyethylene (HDPE) is prepared from ethylene by a catalytic process.