Shanghai Renzhong Industry Co., Ltd. is a leading manufacturer of waterproof materials such as natural sodium bentonite Geosynthetic Clay Liner (GCL). We have been committed to develop waterproofing system, and promote our new type waterproofing materials of high-end environmental protection. Our products have been used in lots of international projects such as Shanghai World Expo China Pavilion. Now we have become a hi-tech company of building materials, with supply R&D, design, production, marketing, and construction service.