3/4" Black HDPE Sheet Cut-to-Size. . 51446104-CTS. HDPE (High Density Polyethylene) has a ntinuous use temperature range of -50°F (-46°C) to 180°F (82°C). It is a standard material and offers high impact strength, high chemical resistance, and very low water HENAN OKAYorption. HDPE offers strength and rigidity for many applications requiring