LRB rock wool mattress are made out of molten rocks (Basalt) transformed into fibres and then bonded with thermosetting binder forming mattress and then it is stitched with one side or both sides GI or SS hexagonal wire netting. LRB rock wool mattress are exceptionally suitable for wrapping large curve surface or cutting to fit over irregular surfaces like Boilers, Equipments, E.S.P, Ducts, Ovens, Furnaces, Tanks, Pipe Lines, Chimney Walls etc.