1.water proof 2.heat insulation 3.sound insulation 4.width:950mm 5.length:depends on you Our sandwich panel is widly used in steel workshop, easy building, prefab building, civil buildng, prefabricated house, ceiling and roof.For the structure of this product, it is consist of two parts, the one is glass steel, the other one is polyurethane. it has excellent ability to remove dirt, so it can be ...