SuperThermoLay® is an uniquely formulated pre-fabricated plastomeric waterproofing membrane with spun bonded polyester mat at its core. SuperThermoLay® has an excellent resistance to weather and ageing. The core of 160 gsm spun bonded non-woven polyester mat offers an excellent tensile strength, elongation and a superior lap joint strength. The polymer modification of bitumen with Atactic Polypropylene (APP) results in an excellent resistance to hot and cold temperatures.