Shanghai red letter insulation waterproof material co., LTD. Is a collection of scientific research, production, sales and construction in the integration of science and technology building materials enterprises, was founded in 1997. The main production and sales "HX" brand high pressure filling machine, water stop needles, polyurethane foaming water-stop, waterproof, plugging materials, such as series of products, and lead the professional work team is committed to waterproof, seepage, reinforcing project scheme design and construction, in the industry establish a good reputation and professional image