"Tianhai" EVA/ECB co-extruded waterproofing membrane is based on EVA and ECB as the main raw materials, adding plasticizer, antioxidant, etc., after extrusion, calendering, qualitative, using two-stage extrusion compounding, three-roll calendering and other advanced Production process, qualitatively homogeneous sheet. The product has excellent performance of EVA and ECB polymer materials, excellent tensile strength, high elongation at break, excellent resistance to root puncture, low temperature resistance and chemical aging resistance.