extruded ploystyrene panel/board low water absorption,high hardness,anti-corrosion,thermal insulated capacity and easy cutting Heat insulation extruded polystyrene XPS foam board or panel The material is polystyrene foam, which is formed by extrusion molding. Low :water absorption, high hardness, good anti-corrosion, good thermal insulated capacity, and easy cutting, high-quality enviormental ...