VersiWeld QA (Quick-Applied) TPO membrane is a heat-weldable single-ply thermoplastic polyolefin (TPO) sheet designed for fully adhered new roof construction and re-roofing applications. VersiWeld QA white TPO is a reinforced TPO membrane laminated to an elastomeric quick-applied adhesive. VersiWeld TPO membrane is based on advanced polymerization technology that combines the durability and weatherability of ethylene-propylene (EP) rubber with the heat weldability of polypropylene. The membrane is specifically formulated for long-term weather resistance without the use of either polymeric or liquid plasticizers.