High Impact Strength and Energy HENAN OKAYorption; Exceptional Low Temperature – Brittle at -110° F; Does not chemically bond; HDPE/LDPE are ITAR mpliant, and HDPE/LDPE are RoHS mpliant; Main Differences: HDPE – Harder material, little to no flex, better tensile strength LDPE – Softer, very flexible, lower tensile strength