Premium thermally conductive aluminum foil tape with acrylic adhesive for heat shielding, sealing, and industrial masking applications. UL classified for low flammability, operates -65°F to 300°F.
3M™ Aluminum Foil Tape 439 is a premium high-performance foil tape engineered for diverse industrial applications across multiple sectors. This linered version of the 3M™ Aluminum Foil Tape 431 features a dead soft aluminum foil backing combined with a highly engineered pressure-sensitive acrylic adhesive system. The tape is specifically designed for heat shielding, heat reflecting, light enhancement, seaming, and sealing applications where thermal conductivity and reliability are critical requirements.
The tape excels in dissipating heat over its surface to reduce hot spots and protect substrates from high-temperature effects while maintaining a strong, reliable bond. With a total thickness of 3.1 mil and dimensions of 6 inches by 60 yards, it provides excellent coverage for industrial masking and protective applications. The thermally conductive aluminum backing withstands exposure to flame, weathering, moisture, and UV radiation, making it suitable for both indoor and outdoor environments. The highly engineered acrylic adhesive ensures long-term durability while removing cleanly after harsh masking applications.
Classified by UL to UL 723 Class "L" for low flammability rating, this tape operates effectively across a temperature range from -65°F to 300°F (-54°C to 149°C). It is ideal for refrigerator and freezer coil attachment, plastic protection, moisture barriers, and EMI/RFI shielding of seams. The linered backing makes it particularly suitable for die-cutting applications, offering precision and consistency in industrial manufacturing processes.
Key Features
- Thermally conductive aluminum foil backing dissipates heat and reduces hot spots
- Highly engineered acrylic adhesive provides long-term durability and clean removal
- Dead soft aluminum foil conforms to curved and uneven surfaces
- UL 723 Class L rated for low flammability with FAR 25.853(a) compliance
- Withstands flame, weathering, moisture, UV exposure, and solvents
- Temperature range -65°F to 300°F (-54°C to 149°C)
- Linered backing suitable for die-cutting applications
- Heat and light reflective properties enhance lighting efficiency
- Ideal for EMI/RFI shielding of seams and electrical applications
Technical Specifications
| Specification |
Value |
| Product Name | 3M™ Aluminum Foil Tape 439 |
| Part Number | 439 |
| UPC Code | 00051125855693 |
| 3M ID | 7010314247 |
| Backing Material | Dead Soft Aluminum Foil |
| Adhesive Type | Pressure-Sensitive Acrylic |
| Product Color | Silver |
| Overall Width (Imperial) | 6 inches |
| Overall Width (Metric) | 152.4 mm |
| Overall Length (Imperial) | 60 yards |
| Overall Length (Metric) | 54.86 meters |
| Total Tape Thickness without Liner (Imperial) | 3.1 mil |
| Total Tape Thickness without Liner (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 |
| Smallest Saleable Unit | Roll |
| Package Quantity | 2 Rolls per Case |
| UL Classification | UL 723, Class L (Low Flammability) |
| FAR Compliance | FAR 25.853(a) |
| Brand | 3M™ |
| Primary Application | EMI RFI Shielding of Seams |
| Industries | Aerospace, Appliance, Automotive, Construction, Electronics, General Industrial, Metalworking, Military, Specialty Vehicles, Transportation |
| Recommended Applications | Heat shielding, heat reflecting, moisture barrier, light reflecting, seaming, sealing, refrigerator/freezer coil attachment, plastic protection |
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