800 Series Spin-Glas duct and equipment insulation is manufactured from inorganic glass fibers bonded together with thermosetting resin. 800 Series Spin-Glas is available plain or faced in a variety of densities for use on systems which operate up to 450 F (232 C). For faced products, surface temperature should not exceed 150 F (66 C). AP or FSK vapor retarder faced material meets the requirements of NFPA 90A and 90B. Types 813, 814, 815 and 817 provide neat, square corners for an excellent finished appearance on duct and equipment systems. Spin-Glas can be readily cut with an ordinary knife and secured utilizing mechanical fasteners and/or adhesives.