... in steel door or galvanized steel sheet was unable to solve due to high moisture content while traditional processing.The fire board ... 43mm, 46mm, 48mm, 50mm and etc.Any size can be produced according to client requirements. Wide range using of Perlite board:Due ... and etc. It is reliable fireproof and aseismatic construction material to be used where house, hotel, shopping mall, factory yard, school, ...