3M 7100040979 Aluminum Foil Tape 4 Inch 54.86 M Roll

Product Description

The 3M 7100040979 is a heavy-duty aluminum foil tape designed for heat shielding, heat reflecting, seaming, and sealing across a wide range of trade and industrial applications. It features a dead-soft aluminum foil backing paired with a pressure-sensitive acrylic adhesive engineered for long-term durability. The tape measures 4 inches wide on a 54.86-meter roll. It is rated by UL to UL 746C and classified by UL to UL 723, Class L for low flammability. HVAC technicians, sheet metal workers, and industrial maintenance professionals are the primary installers of this product.

This foil tape is suited for residential and commercial HVAC duct seaming and sealing, heat shielding in high-temperature environments, and surface protection applications requiring reflectivity or moisture resistance. It performs in demanding conditions involving flame exposure, weathering, UV, and moisture. The acrylic adhesive bonds firmly during service but removes cleanly after masking use, making it practical for temporary and permanent applications alike.

Key Features

• Dead-soft aluminum foil backing for effective heat shielding in demanding applications
• Pressure-sensitive acrylic adhesive provides long-term durability and clean removal after masking
• Withstands exposure to flame, weathering, moisture, and UV
• Heat and light reflective surface protects substrates and can enhance lighting efficiency
• UL Recognized to UL 746C and UL Classified to UL 723, Class L low flammability rating

Compatibility

Designed for use in HVAC duct seaming and sealing, heat shielding, and surface protection applications across residential, commercial, and industrial settings.

Installation Notes

Installation is typically performed by HVAC technicians or sheet metal workers. Ensure the application surface is clean, dry, and free of dust or oils before applying the tape for maximum adhesion. Apply firm, even pressure across the full width of the tape after placement. Follow applicable mechanical codes and manufacturer recommendations for duct sealing applications.