There are several TPO membranes to choose from. The most common TPO used is EverGuard’s Extreme TPO which offers the ultimate performance over the standard TPO membranes available. The EverGuard Extreme TPO is guaranteed to last up to 35 years! Its patent-pending technology provides you with a next-generation performance against UV degradation and heat aging; which are the two key factors considered when grading a roof systems longevity and performance. Why settle for anything less than when you can get advanced protection for your property.