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Description:Material: white polypropylene, paper, metalized PET film, 3-direction fiberglass scrim, adhesive Application: used as laminated facing and vapor retarder for such insulation materials as glass wool, rock wool, slag wool, suitable to be on-site laminated on duct wraps, wool sheet, and wool blanket, meets stringent requirements of HVAC system and heat insulation requirements of building Features: water-proof, moist-proof, no delamination for 4 hours at 23 degrees centigrade