HDPE sheets are made from petroleum-based polymers, specifically designed for durability and flexibility. They exhibit a high strength-to-density ratio, which means they are both strong and light. The 500 micron HDPE sheet, for example, is a thin yet reliable option often used for lining and packaging due to its lightweight nature. Despite being lightweight, these sheets offer excellent impact resistance, UV stability (when treated), and chemical resistance. HDPE sheets do not absorb moisture, making them ideal for wet environments and long-term outdoor applications.