High-performance aluminum foil tape with thermally conductive acrylic adhesive for heat shielding, EMI/RFI shielding, and thermal management in industrial applications. Withstands extreme temperatures from -65°F to 300°F with excellent moisture and UV resistance.
3M™ Aluminum Foil Tape 439 is a high-performance industrial adhesive tape engineered for demanding applications requiring thermal management and EMI/RFI shielding. Featuring a dead soft aluminum foil backing combined with a highly engineered pressure-sensitive acrylic adhesive, this tape delivers exceptional thermal conductivity to dissipate heat and protect temperature-sensitive materials. The thermally conductive properties help reduce hot spots while maintaining reliable bonding in extreme environments. This linered version is specifically designed for die-cutting applications, making it ideal for precision industrial manufacturing. The tape withstands exposure to high heat, humidity, moisture, weathering, UV radiation, and various solvents, ensuring long-term durability in both indoor and outdoor applications.
The 3M Aluminum Foil Tape 439 offers superior performance characteristics including excellent heat reflection for light enhancement and EMI/RFI shielding of seams. With a total thickness of 3.1 mil and backing thickness of 1.9 mil, this tape provides optimal balance between flexibility and structural integrity. The tape conforms easily to curved and uneven surfaces due to its dead soft aluminum backing, while the acrylic adhesive removes cleanly after harsh masking applications. Classified by UL to UL 723 Class "L" for low flammability rating, this tape meets F.A.R 25.853(a) standards, making it suitable for aerospace and military applications.
Each case contains 2 rolls of 180-yard length tape with a 3.25-inch width, providing substantial coverage for large-scale industrial projects. The tape operates reliably across a temperature range from -65°F to 300°F (-54°C to 149°C), making it suitable for refrigeration, freezer applications, heat shielding of delicate parts, moisture barriers, and general sealing and seaming operations. With a 24-month shelf life and acrylic adhesive technology, this industrial-grade tape maintains consistent performance throughout its lifespan.
Key Features
- Thermally conductive dead soft aluminum foil backing dissipates heat and reduces hot spots
- Highly engineered acrylic adhesive provides long-term durability and clean removal after masking
- Conforms to curved and uneven surfaces for superior coverage and sealing
- Withstands extreme temperatures from -65°F to 300°F with excellent moisture and UV resistance
- UL 723 Class L rated for low flammability and meets F.A.R 25.853(a) aerospace standards
- Linered design suitable for precision die-cutting applications
- Excellent EMI/RFI shielding for seams and electrical components
- Heat and light reflective properties enhance lighting efficiency and thermal management
Technical Specifications
| Specification |
Value |
| Product Name | 3M™ Aluminum Foil Tape 439 |
| Part Number | 439 |
| 3M Product Number | 439 |
| 3M ID | 7010379729 |
| UPC Code | 00051125855426 |
| Color | Silver |
| Backing Material | Aluminum Foil |
| Adhesive Type | Acrylic |
| Overall Width (Imperial) | 3.24 inches |
| Overall Width (Metric) | 82.29 mm |
| Overall Length (Imperial) | 180 yards |
| Overall Length (Metric) | 164.59 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 |
| Smallest Saleable Unit | Roll |
| Packaging | 2 Roll/Case |
| UL Classification | UL 723, Class L |
| FAR Compliance | F.A.R 25.853(a) |
| Brand | 3M™ |
| Application | EMI RFI Shielding of Seams |
| Industries | Aerospace, Appliance, Automotive, Construction, Electronics, General Industrial, Metalworking, Military, Specialty Vehicles, Transportation |
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