High-performance aluminum foil tape with acrylic adhesive for heat shielding, thermal conductivity, and industrial sealing applications. Withstands extreme temperatures from -65°F to 300°F with UV and moisture resistance.
3M™ Aluminum Foil Tape 439 is a high-performance industrial adhesive tape designed for demanding applications requiring thermal conductivity and heat dissipation. Featuring a dead soft aluminum foil backing with a highly engineered pressure-sensitive acrylic adhesive, this linered tape is ideal for heat shielding, heat reflecting, light enhancement, seaming and sealing applications across aerospace, appliance, automotive, construction, electronics, and general industrial sectors. The tape excels at dissipating heat over its surface to reduce hot spots and protect temperature-sensitive substrates from high temperature effects.
This premium foil tape withstands exposure to extreme conditions including high heat, humidity, moisture, weathering, UV radiation, and harsh chemicals while maintaining a strong and reliable bond. The dead soft aluminum backing conforms easily to curved and uneven surfaces, making it versatile for complex applications. With a temperature use range from -65°F to 300°F (-54°C to 149°C), it provides reliable performance in both indoor and outdoor environments. The tape is classified by UL to UL 723 Class "L" for low flammability rating and meets F.A.R 25.853(a) specifications.
The linered version design makes 3M™ Aluminum Foil Tape 439 particularly suitable for die-cutting applications, providing precision and efficiency in manufacturing processes. Recommended applications include heat shielding of delicate parts, moisture barriers, light reflecting for enhanced lighting efficiency, seaming and sealing, refrigerator and freezer coil attachment, and plastic protection. Each roll measures 12 inches wide by 60 yards long with a 3.1 mil total thickness, providing ample coverage for industrial applications.
Key Features
- Dead soft aluminum foil backing conforms to curved and uneven surfaces for versatile applications
- Thermally conductive tape dissipates heat and improves heating and cooling efficiency
- Highly engineered acrylic adhesive provides long-term durability while removing cleanly after harsh masking applications
- Withstands exposure to flame, weathering, moisture, UV radiation, and harsh chemicals
- Heat and light reflective properties protect surfaces and enhance lighting efficiency
- UL 723 Class L low flammability rating and FAR 25.853(a) compliance for aerospace applications
- Linered design suitable for precision die-cutting applications
- Temperature range from -65°F to 300°F (-54°C to 149°C) for extreme environment performance
- Ideal for heat shielding, moisture barriers, seaming, sealing, and refrigeration applications
- 24-month shelf life with consistent performance reliability
Technical Specifications
| Specification |
Value |
| Product Name | 3M™ Aluminum Foil Tape 439 |
| Part Number | 439 |
| UPC | 00051125855495 |
| Backing Material | Dead Soft Aluminum Foil |
| Adhesive Type | Pressure-Sensitive Acrylic |
| Product Color | Silver |
| Overall Width (Imperial) | 12 inches |
| Overall Width (Metric) | 304.8 mm |
| Overall Length (Imperial) | 60 yards |
| Overall Length (Metric) | 54.86 meters |
| Total Tape Thickness (Imperial) | 3.1 mil |
| Total Tape Thickness (Metric) | 0.08 mm |
| Backing Thickness (Imperial) | 1.9 mil |
| Backing Thickness (Metric) | 0.05 mm |
| Primary Liner Thickness (Metric) | 0.14 mm |
| Tensile Strength (Imperial) | 18 lb/in |
| Tensile Strength (Metric) | 31.5 N/100mm |
| Elongation at Break | 3% |
| Minimum Operating Temperature (Fahrenheit) | -65°F |
| Minimum Operating Temperature (Celsius) | -54°C |
| Maximum Operating Temperature (Fahrenheit) | 300°F |
| Maximum Operating Temperature (Celsius) | 149°C |
| Shelf Life | 24 months |
| UL Classification | UL 723, Class L |
| FAA Compliance | Meets F.A.R 25.853(a) |
| Smallest Saleable Unit | 1 Roll |
| Industries | Aerospace, Appliance, Automotive, Construction, Electronics, General Industrial, Metalworking, Military, Military & Government, Specialty Vehicles, Transportation |
| Brand | 3M™ |
| Tape Type | Linered Aluminum Foil Tape |
| Primary Application | EMI RFI Shielding of Seams |
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