Torch Pro S is a smooth surfaced Atactic Polypropylene (APP) modified bitumen roofing membrane specially designed for heat welded applications. Constructed with APP resins, and incorporating a tough polyester reinforcement, Torch Pro S is a durable roof product that is easy to install and provides long-term weathering performance. Torch Pro S membrane can also used as flashing membrane in all applicable specifications, in accordance with recommended installation practices. Torch Pro S has a smooth film surface and polyolefin backing and has good elongation properties, puncture resistance and flexibility.