Shop for HDPE sheets for O&P. HDPE sheet for the O&P market is somewhat stiffer and tougher than polypro (homopolymer polypropylene) and often used for applications where additional durability and support are required. Custom cuts and cut-to-size pieces. HDPE comes in many colors. In stock, ready to ship. Stocked materials typically ship in 2-5 business days. Can’t find what you need? Get a quote.