Frost insulation slab PAROC XES 200j is extruded polystyrene insulation for underground building applications. The slab is made of extruded polystyrene cellular plastic (XPS) with tongued and grooved edges. A water repellent ground insulation slab can be used in all underground applications. The load bearing capacity of the slab is the main factor when choosing the right product. The short term compressive strength of the slab is 200 kPa, which means that the slab can carry a 20000 kg/m2 load.