0.220 mm in 4′ x 8′ or 4′ x 10′ sheets. 0.400 mm in 4′ x 8′ or 4′ x 10′ sheets. These smooth, white HDPE polyethylene sheets are suitable for both walls and ceilings. Due to their durability, flexibility and abrasion-resistance, high density polyethylene sheets have a wide range of mmercial, industrial, agricultural and