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Rockwool mineral wool sections of stone wool insulation come with a factory-applied foil facing a self-adhesive lap. These pre-slit sections allow quick, easy application. They provide acoustic and thermal insulation for HVAC pipes ranging from 0C to 250C. Ideal for both industrial and residential settings, the self-adhesive lap snaps onto pipework, saving time. Simply use backing tape to seal the joint fully. Measuring 20mm thick and 1 metre long, they fit pipes between 17mm and 60mm in diameter. These sections are convenient, versatile, and compliant with Class 0 standards. Installation is quick and easy.. Rockwool Rocklap 20mm Wall x 1m Foil Faced Pipe Insulation - 42mm Mineral Wool PBR4220