... 1987. Radioactivity: GB65662001 A ClassFiber Cement Board is a superior, weather resistance, pre- ... cement, silica sand, special cellulose, fibers and synthetic cement silica binder to impart durability, toughness and water resistance. The board ... board and fireproofing door scale board . Access flooring, desktop board, billboard, goods chest and wallboard of kitchen and toilet. Fiber cement board ...