China's high-quality stp Waterproof insulation board best-selling products manufacturersStp Waterproof insulation board has the following characteristics1. Low thermal conductivity, excellent insulation effect, the equivalent of 4 times the polyurethane, extruded board 5 times, 6 times the polystyrene board, insulation mortar 12 times, 30 times the brick wall.2.STP board for the inorganic thermal ...