X-FOAM^® WAFER is an indigo blue thermal insulation board made of single-layer extruded polystyrene, with extrusion skin, wafer surface and 4 straight edges. The boards have nominal compressive strength values of ≥ 300 kPa, and are 600 mm wide, 1250 mm long and 30 to 120 mm thick. X-FOAM^® WAFER has a fire classification of EUROCLASS E according to European standard EN 13501-1.