3M 7100043924 Foil Tape Silver 3 Inch 33.33 Yd

Product Description

The 3M 7100043924 is an aluminum foil tape built for HVAC ductwork sealing, vapor barrier repairs, and insulation facing splices. It is constructed from 2.0 mil aluminum foil backed with a heavy mastic adhesive that creates a durable, water-resistant bond. The tape measures 3 inches wide and runs 33.33 yards per roll, giving technicians substantial coverage per roll. It carries a UL 723 classification with a 0/5 Flame/Smoke rating, making it suitable for applications where code-compliant duct sealing is required. HVAC contractors and sheet metal mechanics are the primary installers of this product.

This tape is used in residential and commercial HVAC installations for sealing rigid duct board seams, flexible duct connections, and insulation facing joints. The mastic adhesive provides high deposition coverage, conforming well to irregular surfaces and maintaining adhesion in the temperature ranges typical of forced-air duct systems. The aluminum foil facing reflects heat and resists moisture, making it appropriate for both supply and return-side duct applications.

Key Features

• 2.0 mil aluminum foil construction for durability and heat reflectivity
• Heavy mastic adhesive provides high deposition and water-resistant bond
• UL 723 Classified with 0/5 Flame/Smoke rating for code-compliant duct sealing
• 3 inches wide and 33.33 yards long for efficient coverage per roll
• Suitable for duct board seams, insulation splices, and vapor barrier repairs

Compatibility

Designed as an OEM-style replacement and general-use foil tape for residential and commercial HVAC duct sealing applications involving rigid duct board, flexible duct, and insulation facing.

Installation Notes

This tape is typically applied by licensed HVAC technicians or sheet metal mechanics during duct fabrication or repair. Power down the air handling system before accessing interior duct surfaces. Ensure all surfaces are clean, dry, and free of dust or oil before applying the tape to achieve full adhesive contact. Reference local mechanical codes and SMACNA guidelines for duct sealing requirements in your jurisdiction.

Technical Specifications

• Width: 3 inches
• Length: 33.33 yards per roll
• Foil Thickness: 2.0 mil
• Adhesive Type: Mastic
• Color: Silver
• Flame/Smoke Rating: 0/5 (UL 723 Classified)
• Unit of Measure: Roll
• Minimum Order Quantity: 16
• UPC: 750351258050

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7100043924