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Product Description
- 2.0 mil aluminum foil backing is ideal as a vapor seal tape for duct closure
- Listed for both UL181A-P and UL181B-FX
- Permanent acrylic adhesive combined with the durable 2.0 mil backing provides long service life
- Replaces mechanical fasteners for rigid duct board
- Thermally conductive backing helps heating and cooling efficiency
Our 3M™ Foil Tape 3340 is constructed using a 2.0 mil aluminum foil backing with a strong, pressure sensitive acrylic adhesive for long-term adhesion, along with an easy releasing poly coated kraft paper liner to protect the adhesive and keep the tape ready for use. The highly engineered aggressive acrylic adhesive performs in both cold and hot temperature conditions.
Ideal for sealing rigid, fiberglass ductboard systems and flexible, non-metallic air ducts
Recommended Applications- Heating Ventilation Air Conditioning (HVAC)
- Duct closure
- Vapor seal on reinforced fiberglass duct board
- For use with rigid fiber glass duct board
- For use with flexible air ducts and air connectors
Superb Temperature Resistance
When sealing ducts and other surfaces for heating, ventilation and air conditioning systems, it's essential to have a strong, long-lasting foil tape that can stand up well to hot and cold temperatures. The 3M™ Foil Tape 3340 has the combination of a foil backing and acrylic adhesive that gives our tape a superb operational temperature range of -40°F (-40°C) to 300°F (149°C). The benefits don't end there; the foil backing also serves as an excellent barrier against moisture, dust and many chemicals — making it strong, durable and long-lasting. The very low moisture vapor transmission rate makes the tape a good sealant and the acrylic adhesive supplies superior temperature and UV resistance to give you a strong, lasting and reliable bond. 3M™ Foil Tape 3340 is used in a variety of applications across a number of industries, including: transportation, specialty vehicle, metalworking, construction, automotive, military and government, general industrial, MRO, electronics and aerospace.
Trusted 3M Foil Tape
The 3M Foil Tape 3340 is a reliable choice for sealing and duct closure. This model features a 2.0 mil aluminum foil backing that acts as a vapor seal tape, ensuring durability and performance in HVAC systems.
Its permanent acrylic adhesive offers long-lasting adhesion, making it ideal for rigid fiberglass duct boards and flexible air ducts. The tape meets UL181A-P and UL181B-FX standards, confirming its quality and safety.
Strong Aluminum Backing
With a 2.0 mil aluminum foil backing, this tape provides excellent protection against moisture, dust, and chemicals. This backing also helps improve heating and cooling efficiency by being thermally conductive.
The foil backing is sturdy enough to replace mechanical fasteners on rigid duct board, simplifying installation and providing a clean, secure seal for HVAC applications.
Precise Size And Format
This product comes in a size of 2 1/2 inches by 50 yards, offering ample length for multiple sealing jobs. The 3.9 mil thickness ensures a balance of flexibility and strength for various surfaces.
It is supplied in a convenient pack of 20 rolls per case, making it suitable for professional use or large projects where consistent quality and quantity are needed.
Wide Temperature Range
The 3M Foil Tape 3340 performs well in extreme temperatures, with an operational range from -40°F (-40°C) up to 300°F (149°C). This makes it suitable for both hot and cold environments encountered in HVAC systems.
The acrylic adhesive maintains a strong bond despite temperature changes, while the foil backing acts as a barrier against moisture and UV exposure, extending the tape’s service life.
Versatile HVAC Applications
This tape is designed for heating, ventilation, and air conditioning uses, including duct closure and vapor sealing on reinforced fiberglass duct board. It works well with both rigid and flexible air ducts and connectors.
Industries such as automotive, aerospace, construction, and military rely on this tape for its durability and reliability, making it a trusted choice across many fields.
