... formaldehyde,sound-absorption,thermal-insulation,fire-resistance,humidity and rot-resistance,Freeze-resistance,earthquake-resistance,Vermin and termite resistance etc.,and adapt to ... 55. According to GB/T16731-1997,the wood wool sound-absorbing board is 1 class.4) Fire-resistanceAccording to National ... through mineralized material handing,which is no fear of water,also can keep using for a long time ...