The u. S. Co. Ltd. Is a research and development firm for high-tech specialized waterproofing materials with process formulations, production techniques and major raw materials from the united states. Its domestic production base, zhejiangque watershire, ltd., is located in the zhejiang zhejiang zhejiang zhejiang zhejiang zheng city industrial district, with a registered funding of $10 million. The main products are: water-protective paint series, waterproof agent series, leakproof series, waterproof scroll series. In the united states, keifu branded products have been certified by the american material and materials testing association, with inspection reports from the centre for testing of building materials, and are insured by the people's property insurance corporation of china for quality of its products, which are insured for 30 years. In march 2013, the kwf brand was re-enlisted in the advertising field, and its high quality and innovative capabilities were recognized by a wi...