Shop for Homopolymer Polypropylene sheets. Homopolymer polypropylene sheet is stronger and stiffer than copolymer. It is a very durable, rigid plastic available in natural (a translucent white) and a variety of colors. Custom cuts and cut-to-size pieces. Have machined into fabricated parts. Stocked materials typically ship in 2-5 business days. Can’t find what you need? Get a quote.