High temperature calcium silicate door core for fireproof insulation door is a kind of inorganic and non-combustible material with stable physical and chemical properties. The characteristics are high temperature resistance, low thermal conductivity, good performance of soundproof and insulation, lightweight and high special strength. It does not deform in normal temperature or moist air. Free from asbestos, is a kind of green building material, have not any irritant smoke when burning and under high temperature. High temperature calcium silicate door core is widely used for 30min, 60min and 90min fire rate wooden fire door and metal fire door. And had already got the certificate of ITS Lab of North America. For steel fire door Bulk Density kg/m3 280~320 Flexural Strength Mpa >0.5 Thermal Cond. W/m.k <0.07 Service temp. centigrade 1200 Linear Shrinkage(1000 3h)% <1.5 For Wooden fire door Bulk Density kg/m3 320~360 Flexural Strength Mpa >0.6 Thermal Cond. W/m.k <0.07 Service temp. centigrade 1200 Linear Shrinkage(1000 3h)% <1.5 Standard Size: 1050X850, 1000X500mm Thickness: 35-50mm We could band to many size as customer require. eg: 2150x915mm etc.