Seal and reinforce metal seams with the Aluminum Foil Tape. The aluminum foil backing lays flat over ducts, vents, and insulation joints, creating a durable barrier that stands up to temperature swings. An aggressive adhesive bonds to clean metal surfaces so patches and seams stay put. It conforms around corners and fasteners for tidy overlaps without lifting. Use it for HVAC sealing, reflective patch work, and quick fixes on metal panels. Made for long lasting, clean looking repairs and vapor sealing.