Owens Corning FIBERGLAS SSL II Pipe Insulations are molded of heavy density resin bonded inorganic glass fibers. The one piece, 36" long, hinged sections are opened, placed over the pipe, closed and secured. FIBERGLAS SSL II Pipe Insulation is jacketed with a smooth reinforced, wrinkle resistant all-service vapor barrier retarder jacket (ASJ). Uses: Insulation of hot, cold, and concealed and exposed piping operating at temperatures from 0 degrees F (-18C) to 850 degrees F (454C) in commercial buildings, industrial facilities and process or power plants.