HD calcium silicate is a kind of non-combustible a grade material with stable physical and chemical properties. The characteristics are non-toxic, non- asbestos, high temperature and pressured resistance, good performance of fire-proof and insulation and arbitrary processing. It dose not deform in normal temperature or moist air. Free from asbestos, is a kind of green building material, havent any irritant smoke when burning and high temperature. This kind of material had already widely used as the cores of fire-proof and sound insulation door, machinery facilities, floorboard in various field. This product has exported to North America, Canada, Germany, South Africa and Singapore etc.. And have already earned more honors from the customers. It has a number of patented technologies, the manufacturing technology and product quality is unique in our country and keeping ahead in the world.