... board,fire proof board Features: 1) 100% asbestos free 2) Thickness: 20 - 60mm 1,Green,Natural 2,Smooth,Uniform thickness 3,Light ... ,easy to work 4,Corrosion Free This board is widely used in the fire door and insulation ... solve due to high moisture content while traditional processing.4,light,hi-strength,anticorrosion,non-aging5,Less production procedure and workload ...