3M 7100043878 Aluminum Foil Tape Silver 2.83 in 50 Yd

Product Description

The 3M 7100043878 is a high-temperature aluminum foil tape engineered for demanding HVAC and mechanical insulation applications. Built on a 2 mil aluminum foil backing coated with a solvent acrylic adhesive, this tape maintains a strong, aggressive bond in sustained heat environments reaching 425 degrees F. The foil backing reflects heat effectively, helping protect adjacent components and insulation materials. HVAC technicians and sheet metal contractors use this tape for sealing, bundling, and closing duct and flue pipe assemblies where standard tapes fail. The easy-release paper liner and hand-tearable foil allow for fast, clean installation without additional tools.

This tape is designed for high-heat flue and duct closure applications in both residential and commercial HVAC systems. It performs well on irregular surfaces thanks to a conformable aluminum foil construction that follows contours without lifting. The acrylic adhesive resists moisture, UV exposure, and a broad range of chemicals, making it suitable for exposed mechanical spaces and outdoor-adjacent installations. Each roll measures 2.83 inches wide and 50 yards long, providing substantial coverage per roll for production or service work.

Key Features

• 2 mil aluminum foil backing rated for continuous service up to 425 degrees F
• Solvent acrylic adhesive bonds aggressively to metal, foil-faced insulation, and duct surfaces
• High heat reflectivity shields adjacent heat-sensitive components
• Resistant to moisture, UV, and common chemicals for long-term durability
• Conforms to irregular shapes and contoured surfaces
• Hand-tearable for fast field installation without cutting tools
• Easy-release paper liner for clean, controlled application

Compatibility

Designed for high-heat duct sealing, flue pipe closure, and foil-faced insulation lap sealing in residential and commercial HVAC and mechanical systems.

Installation Notes

Installation is typically performed by licensed HVAC technicians or sheet metal contractors. Clean and dry all surfaces before application to ensure full adhesive contact. Apply firm pressure across the full tape width to maximize bond strength on duct and flue joints. Follow local mechanical codes, including SMACNA standards, for approved taping and sealing methods on air distribution systems.

Technical Specifications

• Backing Material: 2 mil aluminum foil
• Adhesive Type: Solvent acrylic
• Maximum Service Temperature: 425 degrees F (218 degrees C)
• Width: 2.83 inches
• Length: 50 yards per roll
• Unit of Measure: Roll
• Weight: 32.802 pounds
• UPC: 750351324335

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7100043878