Elastomeric-plastomeric polymer distilled bitumen membrane, REOXTHENE Ultralight Technology. POLYFLEX LIGHT P is a prefabricated ELASTOMERIC-PLASTOMERIC membrane offering excellent performance and high flexibility values even at low temperatures, by virtue of a higher percentage of polymers such as POLYPROPYLENE (APP) and POLYOLEFIN (APAO). Its special formulation, comprising the exclusive REOXTHENE Ultralight Technology compound, also results in the only weight-to-thickness ratios of their kind. The addition of special anti-ageing additives provides blends with superior, long-lasting performance characteristics. POLYFLEX LIGHT P is a membrane produced to the standards set by NAT technology, the innovative production system for the control of polymer matrix ageing in bitumen membranes. POLYFLEX LIGHT P has a spunbond polyester nonwoven carrier stabilized with glass strands parallel to the machine direction. The carrier gives good tensile strength (in all directions) and puncture resistance, with excellent dimensional stability.