HD Blanket is produced from molten basalt rocks, spun to fine fibers, slightly bonded with thermo setting binder formed into flexible rolls. It is also produced by stitching rock fibers with cotton or fiberglass yarns.
It can be non-faced or faced from one or both sides with reflective vapor retarder reinforced aluminum foil; it meets the technical requirements of ASTM C 553 (Specification for Mineral Fiber Blanket Thermal Insulation for Commercial and Industrial Applications).
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