Premium industrial aluminum foil tape with thermally conductive acrylic adhesive for heat shielding, sealing, and thermal management applications with UL 723 Class L flammability rating.
3M™ Aluminum Foil Tape 439 is a high-performance industrial adhesive tape engineered for demanding applications requiring thermal conductivity and heat dissipation. This premium foil tape features a dead soft aluminum foil backing combined with a highly engineered pressure-sensitive acrylic adhesive, making it ideal for heat shielding, heat reflecting, light enhancement, seaming, and sealing applications across aerospace, appliance, automotive, construction, electronics, and military industries. The thermally conductive aluminum backing effectively dissipates heat over the tape surface to reduce hot spots and protect substrates from high temperature effects while maintaining a strong, reliable bond even under extreme conditions.
The 3M Aluminum Foil Tape 439 is specifically designed as a linered version of the 3M Aluminum Foil Tape 431, making it particularly suitable for precision die-cutting applications where clean, consistent results are essential. This tape withstands exposure to high heat and humidity, flame, weathering, moisture, UV radiation, and various solvents, providing excellent work life both indoors and outdoors. With a total thickness of 3.1 mil and backing thickness of 1.9 mil, this tape delivers professional-grade performance for critical industrial applications.
Classified by UL to UL 723 Class "L" for low flammability rating (File R 7311) and meeting F.A.R 25.853(a) standards, this tape operates reliably across a temperature range from -65°F to 300°F (-54°C to 149°C). Each roll measures 13 inches wide by 60 yards long, providing ample coverage for multiple applications. The product is formulated for industrial and occupational use only, ensuring compliance with workplace safety standards and regulations.
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
- Withstands exposure to flame, weathering, moisture, UV and solvents
- UL 723 Class L low flammability rating for safety-critical applications
- Temperature range from -65°F to 300°F (-54°C to 149°C)
- Linered design suitable for precision die-cutting applications
- Heat and light reflective properties enhance lighting efficiency
- Suitable for EMI/RFI shielding of seams
- Excellent moisture barrier and sealing performance
Technical Specifications
| Specification |
Value |
| Product Name | 3M™ Aluminum Foil Tape 439 |
| Part Number | 439 |
| UPC Code | 00051125856607 |
| Backing Material | Dead Soft Aluminum Foil |
| Adhesive Type | Pressure-Sensitive Acrylic |
| Product Color | Silver |
| Width (Imperial) | 13 inches |
| Width (Metric) | 330.2 mm |
| Length | 60 yards (54.86 meters) |
| Total Tape Thickness | 3.1 mil (0.08 mm) |
| Backing Thickness (Imperial) | 1.9 mil |
| Backing Thickness (Metric) | 0.05 mm |
| Primary Liner Thickness | 0.14 mm |
| Tensile Strength (Imperial) | 18 lb/in |
| Tensile Strength (Metric) | 31.5 N/100mm |
| Elongation at Break | 3% |
| Minimum Operating Temperature | -65°F (-54°C) |
| Maximum Operating Temperature | 300°F (149°C) |
| Flammability Rating | UL 723 Class L |
| Regulatory Compliance | F.A.R 25.853(a), UL File R 7311 |
| Shelf Life | 24 months |
| Unit of Sale | 1 Roll per Case |
| Industries Served | 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, EMI/RFI shielding |
| Brand | 3M™ |
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