... to install 4.Low thermal insulation Insulation board fireproof material calcium silicate board ceiling board JRCSB92Physical Properties CommodityCalcium Silicate BoardBrand nameJINRUANModelJRCSB92ColorLight gray(other color also supplied ... weight, highstrengh, fier-proof, water-proof, moisture-proof, sound insulation, heat insulation, thermal insulation,anti-shock,anti-impact,anti-aging,corrosion ...