The calcium silicate fire door core of our company is designed as the core material especially for the steel and wood fire doors with the fire resistance rating of 60 minutes, 90 minutes, and 120 minutes. With the properties of high heat resistant temperature, low thermal conductivity, small bulk density and high specific strength, the product performs excellent in the aspect of heat and sound insulation. Long-term usage won't lead to deformation. The fire door core doesn't contain asbestos absolutely. It won't release harmful and toxic gas under high temperature and there is no smog spreading around. The product can be processed by ordinary wood processing machine. The operator can cut and joint the product according to the needs, so the product is fit for fire doors with different design structures. The calcium silicate fire door core of our company has been exported to North America, South Africa and Middle Eat for long time.