Calcium Silicate has a maximum service temperature of 1000 degrees Celsius. These insulation board are  mainly used as a back-up insulation panels behind firebricks or insulation bricks. The boards can be used in wood oven construction or for use in Kilns and furnaces. Calcium Silicate is very brittle and has a a high Cold crushing strength. Typical analysis sheets are available upon request for all the refractory products we sell including these calcium silicate boards.