Rockwool Resin Bonded Mattress can be faced on one side or both sides to form a firm and flexible multipurpose insulating media. The Mattress ensures good stability, due to uniform thickness and density, resulting in prevention of heat losses. The Rockwool Resin Bonded Mattress is available in densities of 80 to 150 kg/m ³ in the size of 1640 X 1220 mm and thicknesses are available from 25 mm to 100 mm.