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The 3M 7100043789 is a white metalized polypropylene foil tape designed for insulation facing and duct sealing applications in HVAC systems. It features a tri-directionally reinforced film/scrim/kraft construction laminated with a cold weather acrylic pressure-sensitive adhesive that maintains bond strength in low-temperature environments. The tape meets ASTM C1136 Type I, II, III, and IV, making it suitable for a range of insulation facing requirements. Licensed HVAC technicians and insulation contractors use this tape to seal, patch, and join duct insulation facing where vapor retardancy and mechanical reinforcement are required.
This tape is used in residential and commercial HVAC duct insulation work, particularly in situations where ambient or surface temperatures drop below the threshold for standard foil tapes. It is suited for sealing joints and seams on flexible duct insulation, duct board, and fiberglass blanket insulation. The cold weather acrylic adhesive system ensures reliable initial tack and long-term adhesion when applied in cold storage, unheated spaces, or winter construction conditions. Each roll measures 2.83 inches wide and 50 yards long.
Designed for use with duct insulation facing applications requiring ASTM C1136 compliance, including flexible duct insulation, duct board, and fiberglass blanket insulation systems in HVAC installations.
Installation is typically performed by licensed HVAC technicians or insulation contractors. Surfaces should be clean, dry, and free of dust or oils before application to ensure full adhesive contact. Apply firm hand pressure across the tape width to activate the pressure-sensitive adhesive. Follow local mechanical codes and manufacturer insulation system requirements for seam overlap and tape coverage.
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