The durability of black HDPE sheet makes it ideally suited for a variety of applications such as water tanks, chute linings, and numerous industrial uses. HDPE Polyethylene Sheet - 1" x 12" x 12" Black Rigid. HDPE Polyethylene Sheet - 1" x 12" x 12" Black Rigid. Product details. HDPE (High-density polyethylene) is a thermoplastic derived from