High-performance aluminum foil tape with thermally conductive acrylic adhesive for heat shielding, heat reflecting, and industrial sealing applications. Withstands extreme temperatures from -65°F to 300°F, UV exposure, and harsh environmental conditions.
The 3M™ Aluminum Foil Tape 431 is a high-performance industrial adhesive tape engineered for demanding applications across multiple industries. Featuring a dead soft aluminum foil backing combined with a highly engineered pressure-sensitive acrylic adhesive, this thermally conductive tape excels at heat dissipation and thermal management. The tape is specifically designed to protect temperature-sensitive materials while improving heating and cooling efficiency in various applications.
This professional-grade foil tape offers exceptional durability and reliability in harsh environmental conditions. With excellent aging performance both indoors and outdoors, it withstands exposure to high heat, humidity, moisture, weathering, UV radiation, and various solvents. The acrylic adhesive provides long-term bonding strength while maintaining the ability to remove cleanly after masking applications. The dead soft aluminum backing conforms easily to curved and uneven surfaces, making it versatile for complex geometries and challenging installation scenarios.
Classified by UL to UL 723 Class "L" for low flammability rating and meeting FAR 25.853(a) specifications, the 3M Aluminum Foil Tape 431 is ideal for heat shielding, heat reflecting, light enhancement, seaming, sealing, refrigerator and freezer coil attachment, and plastic protection against heat and UV exposure. With a temperature use range from -65°F to 300°F (-54°C to 149°C), this tape is suitable for industrial and occupational use across aerospace, automotive, appliance manufacturing, and other demanding sectors.
Key Features
- Thermally conductive aluminum foil backing dissipates heat and improves heating/cooling efficiency
- Highly engineered acrylic adhesive provides long-term durability and clean removal after masking
- Dead soft aluminum backing conforms to curved and uneven surfaces for versatile applications
- Withstands extreme temperatures from -65°F to 300°F with excellent aging performance
- UL 723 Class L low flammability rated and FAR 25.853(a) compliant for aerospace applications
- Resistant to moisture, weathering, UV radiation, and solvents for indoor/outdoor use
- Heat and light reflective properties enhance lighting efficiency and protect surfaces
- Ideal for heat shielding, seaming, sealing, and refrigeration applications
Technical Specifications
| Specification |
Value |
| Product Name | 3M™ Aluminum Foil Tape 431 |
| Part Number | 431 |
| Color | Silver |
| Backing Material | Aluminum Foil (Dead Soft) |
| Adhesive Type | Acrylic (Pressure-Sensitive) |
| Overall Width (Metric) | 50 mm |
| Overall Width (Imperial) | 2 inches |
| Overall Length (Metric) | 55 m |
| Backing Thickness (Imperial) | 1.9 mil |
| Backing Thickness (Metric) | 0.05 mm |
| Adhesive Thickness (Imperial) | 1.8 mil |
| Adhesive Thickness (Metric) | 0.05 mm |
| Tensile Strength (Imperial) | 19 lb/in |
| Tensile Strength (Metric) | 33.3 N/100mm |
| Minimum Operating Temperature (Fahrenheit) | -65°F |
| Minimum Operating Temperature (Celsius) | -54°C |
| Maximum Operating Temperature (Fahrenheit) | 300°F |
| Maximum Operating Temperature (Celsius) | 149°C |
| Primary Liner | Easy Release Film |
| Shelf Life | 24 months |
| Smallest Saleable Unit | Roll |
| Package Configuration | 24 Roll/Case |
| UPC Code | 00051125853217 |
| 3M ID | 7100040976 |
| Specifications Met | UL 723 Class L (Low Flammability), FAR 25.853(a) |
| Brand | 3M™ |
| Application Type | Heat Shielding, Heat Reflecting, Moisture Barrier, Sealing, Seaming |
| Indoor/Outdoor Use | Both Indoor and Outdoor |
| Environmental Resistance | Moisture, Weathering, UV, Solvents, High Heat and Humidity |
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