Widely used in wall insulation, flat concrete roof and steel structure roof insulation. XPS extruded board has a dense surface and closed-cell structure inner layer, so it has better thermal insulation performance. Due to the special structure of the extruded board, the compressive strength of the extruded board of different types and thicknesses can reach 150-500kpa or more, and it can be kept unchanged in time for a long time soaking in water, and it can withstand the load of floor heating.