High-performance thermally conductive aluminum foil tape with acrylic adhesive for heat shielding, heat reflecting, and sealing applications. UL classified, temperature range -65°F to 300°F, conforms to curved surfaces, 4 in x 60 yd per roll, 12 roll case.
The 3M™ Aluminum Foil Tape 431 is a high-performance industrial foil tape engineered for superior heat dissipation and thermal management across diverse applications. Featuring a dead soft aluminum foil backing with a highly engineered pressure-sensitive acrylic adhesive, this thermally conductive tape effectively dissipates heat over its surface to reduce hot spots and protect temperature-sensitive substrates from high-temperature effects. The tape is specifically designed for heat shielding, heat reflecting, light enhancement, seaming, and sealing applications in demanding industrial environments.
This professional-grade tape withstands exposure to flame, weathering, moisture, and UV radiation while maintaining excellent adhesion and durability. The highly engineered acrylic adhesive provides long-term durability and reliable bonding performance, yet removes cleanly after harsh masking applications. With a temperature use range from -65°F to 300°F (-54°C to 149°C), this tape is classified by UL to UL 723 Class "L" for low flammability rating and meets F.A.R 25.853(a) specifications, making it suitable for aerospace and demanding industrial applications.
The dead soft aluminum foil backing conforms seamlessly to curved and uneven surfaces, ensuring complete coverage and reliable adhesion on complex geometries. Available as a 12 roll case with each roll measuring 4 inches wide by 60 yards long with 3.1 mil total thickness, this tape delivers consistent performance for refrigerator and freezer coil attachment, plastic protection against heat and UV exposure, moisture barriers, and light reflecting applications in manufacturing, HVAC, and construction industries.
Key Features
- Thermally conductive aluminum foil backing dissipates heat and reduces hot spots on temperature-sensitive materials
- Highly engineered acrylic adhesive provides long-term durability and reliable bonding with clean removal capability
- Dead soft aluminum foil conforms to curved and uneven surfaces for complete coverage
- Withstands extreme temperatures from -65°F to 300°F with excellent resistance to flame, weathering, moisture, and UV exposure
- UL classified to UL 723 Class L for low flammability rating and meets F.A.R 25.853(a) aerospace specifications
Technical Specifications
| Specification |
Value |
| Product Type | Aluminum Foil Tape |
| Brand | 3M |
| Model Number | 431 |
| Part Number | 431 |
| 3M Product Number | 431 |
| 3M ID | 7100168490 |
| UPC Code | 00051125854924 |
| Backing Material | Dead Soft Aluminum Foil |
| Adhesive Type | Acrylic, Pressure-Sensitive |
| Product Color | Silver |
| Overall Width (Imperial) | 4 inches |
| Overall Width (Metric) | 101.6 mm |
| Overall Length (Imperial) | 60 yards |
| Overall Length (Metric) | 54.86 meters |
| Backing Thickness (Imperial) | 1.9 mil |
| Backing Thickness (Metric) | 0.05 mm |
| Adhesive Thickness (Imperial) | 1.8 mil |
| Adhesive Thickness (Metric) | 0.05 mm |
| Total Thickness | 3.1 mil |
| 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 |
| Temperature Use Range | -65°F to 300°F (-54°C to 149°C) |
| Primary Liner | Easy Release Film |
| Smallest Saleable Unit | Roll |
| Rolls Per Case | 12 |
| Shelf Life | 24 months |
| UL Classification | UL 723 Class L - Low Flammability Rating (File R 7311) |
| Specifications Met | FAR 25.853(a) |
| Aging Performance | Good performance both indoors and outdoors |
| Environmental Resistance | Flame, weathering, moisture, UV, and solvents |
| Application Use | Industrial/occupational use only |
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