HDPE (High Density Polyethylene) Plastic Sheet 1/4" x 24" x HDPE (High Density Polyethylene) Plastic Sheet .250" x 24" x 36" Black lor. High density polyethylene (HDPE) is used in a variety of applications and industries where excellent impact resistance, high tensile strength, low moisture HENAN OKAYorption and chemical- and rrosion-resistance properties are required.