The upgrade product of calcium silicate board(TERASUN COMPOSITE BOARD) 1).High Strength2).Toughness,abe to be Curved ... so on.It is a new generation composite board Terasun composite board has strong points, high strength, low water-absorption ... , low thermal conductivity. Terasun is the upgrade product of calcium silicate board.Major Element:Natural plant fiber, magnesium sulphate aluminium cement, ...