3M 7100043954 Venture Tape 1580-P Foil Tape 3 in X 33 Yd

Product Description

The 3M 7100043954 is a 2.0 mil aluminum foil tape coated with a heavy application of mastic adhesive, designed for sealing and joining flexible air ducts and duct boards in HVAC systems. The tape carries a UL181B-FX Listing, making it code-compliant for use on Class 1 flexible air connectors. The high-deposition mastic adhesive creates a water-resistant bond that holds up under the temperature cycling and pressure variations typical of residential and light commercial ductwork. HVAC technicians and sheet metal contractors reach for this tape when a durable, listed foil seal is required by local mechanical code or job specification.

This tape is used in residential and commercial HVAC installations for sealing longitudinal seams, end joints, and repairs on flexible duct systems and duct board assemblies. The 3 inch width provides good coverage across duct seams and irregular surfaces, and the 33.33 yard roll length suits single-job or multi-joint applications. The silver aluminum foil facing reflects heat and resists moisture intrusion, which is especially relevant in unconditioned spaces such as attics, crawlspaces, and mechanical rooms.

Key Features

• UL181B-FX Listed for use on Class 1 flexible air connectors and duct board
• 2.0 mil aluminum foil construction provides durability and heat reflectivity
• High-deposition mastic adhesive delivers strong, water-resistant bond
• 3 inch width suits standard duct seam and joint sealing applications
• 33.33 yard roll length reduces roll changes on larger jobs

Compatibility

Designed for use on UL181B-rated flexible air connectors and duct board assemblies where a UL181B-FX Listed foil tape is specified or required by mechanical code.

Installation Notes

Installation should be performed by a qualified HVAC technician or sheet metal contractor in accordance with the International Mechanical Code and applicable local codes. Shut down the air handling system before applying tape to duct seams or joints. Clean and dry all surfaces before application to ensure full adhesive contact. Do not stretch the tape during application, as this can reduce bond integrity at seam edges.

Technical Specifications

• Tape Thickness: 2.0 mil
• Width: 3 inches
• Length: 33.33 yards
• Adhesive Type: Mastic
• Facing Material: Aluminum foil
• Color: Silver
• Unit of Measure: Roll
• Listing: UL181B-FX
• Weight: 48 pounds

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7100043954