Sack of packing wool Loose rock wool packing wool for padding empty pipe elbows Application area: In construction, ship-building and in the heat, sound and fire-safety insulation industry Advice: Fire rating A1 according to EN 13501-1; Melting point of fibres > 1000°C according to DIN 4102-17; Upper limit for operating temperature 750°C according to EN 14706; Coefficient of thermal conductivity for a packing thickness of 100Kg/m³ at 50°C = 0.037 W/mK