Johns Manville spin-glas 800 series fiberglass board
Johns Manville 800 Series Spin-Glas® equipment and external duct insulation provides a broad range of solutions to meet your unique application needs. The breadth and depth of our product availability includes Plain, FSK, AP (ASJ), or Ultra (poly-top) faced board, where the facing acts as a vapor retarder. 800 Series Spin-Glas board is easily fabricated for an excellent finished appearance on duct and equipment systems.