POLYSHIELD and POLYSHIELD MINERAL are extremely high-performance prefabricated waterproof plastomeric membranes made from a POLYPROPYLENE-modified distilled bitumen compound, with a heavyweight spunbond polyester nonwoven carrier, reinforced and stabilized with glass strands parallel to the machine direction. The special type of compound and the carrier's very good mechanical properties (excellent elongation qualities, considerable shear resistance) combine to make these membranes suitable for even the most demanding jobs. The special formulation gives unique low temperature flexibility properties (cold flexibility down to -20 °C). The innovative technology adopted in the production of these membranes offers an additional guarantee of product quality, stability and lengthy service life. The POLYSHIELD and POLYSHIELD MINERAL membranes are produced to the quality standards set by NAT ® technology the innovative manufacturing system for the control of polymer matrix ageing in bituminous membranes.