HDPE Sheet is available in Black & Natural options. HDPE Sheet also known as High Density Polyethylene Sheet, is a very temporarytile engineering plastic being available from 1mm to 60mm in thickness. HDPE Natural Sheet 250 x 250 x 25mm . Our Price: £23.96 (£28.75 inc VAT) Quantity. Discounts; Tolerances; Want it cut? About Delivery; HDPE