Description
🛡️ Seal like a pro, last like a legend!
- VAPOR SEAL MASTERY - Advanced 2.0 mil aluminum foil backing ensures airtight duct closures.
- DURABILITY THAT LASTS - Moisture, dust, and chemical resistant foil backing for long-term reliability.
- READY TO USE CONVENIENCE - Poly-coated kraft liner guarantees easy peel and hassle-free application every time.
- CERTIFIED HVAC CONFIDENCE - UL181A-P and UL181B-FX listings mean trusted performance for professional-grade sealing.
- EXTREME TEMPERATURE RESILIENCE - Performs flawlessly from freezing -40°F to scorching 300°F environments.
3M Aluminum Foil Tape 3340 is a 2.5" x 50 yd, 4.0 mil thick HVAC tape featuring a 2.0 mil aluminum foil backing with strong acrylic adhesive. It seals and patches hot and cold air ducts, fiberglass duct boards, and metal surfaces, operating reliably between -40°F and 300°F. Certified UL181A-P and UL181B-FX, it offers superior vapor sealing, moisture and chemical resistance, and easy application with a poly-coated kraft liner.
