3M™ 3380 Aluminum Foil Tape
3M™ Aluminum Foil Tape 3380 is a flexible, foil-backed tape engineered for cold weather performance while maintaining durability in high heat and humidity. Coated with a pressure-sensitive acrylic adhesive, it bonds quickly and securely to a wide range of surfaces, even in low-temperature environments. Classified to UL 723, this tape provides long-lasting protection against moisture, UV exposure, and environmental conditions, making it a dependable solution for HVAC systems, construction, and general maintenance in both residential and industrial settings.
Applications include: HVAC duct sealing, vapor barrier protection, insulation facing, patching metal surfaces, and light-duty EMI/RFI shielding.
- Excellent moisture and vapor sealing
- Good conformability for curved or uneven surfaces
- Great general purpose aluminum foil tape
- Low water vapor transmission excellent for duct applications
| Property | Specification |
| Backing (Carrier) Material | 2.0 mil aluminum foil |
| Adhesive Material | 1.3 mil Acrylic PSA |
| Total Thickness (Imperial) | 3.3 mil |
| Total Thickness (Metric) | 0.08 mm |
| Adhesion to Steel (D3330) | 40 oz/in |
| Tensile Strength (kPa) | 68 kPa |
| Tensile Strength (PSI) | 10 psi |
| Elongation at Break | 4% |
| Shielding Effectiveness (Average 300kHz - 2.5GHz) | |
| Product Color | Silver |
| Insulation Resistance | |
| Certifications | UL723 Classified 10/10 flame/smoke rating (file R7311), US Coast Guard approved (CGA#164.112/63/0) |
| Maximum Operating Temperature (Celsius) | 127°C |
| Maximum Operating Temperature (Fahrenheit) | 260°F |
| Minimum Operating Temperature (Celsius) | -34°C |
| Minimum Operating Temperature (Fahrenheit) | -30°F |
