UltraPly™ TPO Flex SA combines two exclusive Firestone technologies in one amazing product. The most flexible TPO on the market* is now available in our Self-Adhered installation method with Secure Bond™ technology. This membrane is specifically engineered to be more pliable, allowing for easier installations on more complex roofs, and maintain flexibility in cold weather. It is also designed to make it less difficult to find weld settings that will achieve reliable welds. Plus, UltraPly TPO is environmentally friendly and delivers benefits like lower roof surface temperatures, greater energy efficiency, superior puncture resistance against hail, and enhanced indoor comfort.