Knauf stone wool K2 140 kg / m³ (50 mm) - the highest density, premium quality heat and sound insulation material. Maximum mechanical sustainability and longevity to the fire is prepared from the basalt stone of volcanic origin. Thanks to the density of 140 kg / m³, heavy loads are resistant, increase the strength of structures and provide a high level of voice absorption. It raises energy efficiency with 50 mm thick, minimizes heat losses. It is an ideal choice for industrial facilities, roofing, facade systems and high-loaded structures.