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Micro-lok fiberglass pipe insulation is made from glass fibers bonded with a thermosetting resin and produced in 36 inch (0.92 m) lengths. Jacketed with a reinforced vapor retarder facing and a factory-applied, longitudinal acrylic adhesive closure system, micro-lok insulation is designed for application temperatures from 0°f to 850°f (-18°c to 454°c). Section joints are sealed with butt strips, which are supplied from the factory. The factory-installed tape system permits installation at ambient temperatures down to 20°f (-7°c) and will not soften or separate when exposed to high ambient temperatures and humidity. Micro-lok fiberglass pipe insulation is suitable for installation over hot, cold, concealed and exposed piping systems with operating temperatures up to 850°f (454°c). weather-protective jacketing is required for outdoor applications. Pipes operating below ambient temperatures require all joints to be sealed with the factory-applied, Self-Seal lap and butt strips.