Thermoplastic polyolefin membrane, unlike conventional thermoset rubbers, can be reprocessed and recycled like thermoplastic materials. Originally used in various applications including the automobile industry, the non-reinforced TPO membrane was replaced with membranes containing reinforcing fabric. Since that time, the TPO single-ply roofing market has grown to hundreds of millions of square feet annually with TPO membrane comprising the fastest growing segment of the U.S. single-ply roofing industry.

TPO roofing membrane is typically based on polypropylene and EP (ethylene-propylene) rubber polymerized together using state-of-the-art polymer manufacturing technology. This technology enables the production of TPO membranes that are flexible at low temperatures without the use of polymeric or liquid plasticizers. Since the TPO polymer does not contain chlorine and no chlorine-containing ingredients are added during sheet production, TPO membranes are an environmentally safe, "green" product.

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