High-performance aluminum foil tape with thermally conductive acrylic adhesive for heat shielding, reflecting, and sealing applications in industrial environments. Features dead soft aluminum backing, UL classified for low flammability, and operates from -65°F to 300°F.
The 3M™ Aluminum Foil Tape 431 is a high-performance industrial foil tape engineered for demanding applications across numerous industries. Featuring a dead soft aluminum foil backing combined with a highly engineered pressure-sensitive acrylic adhesive, this tape delivers exceptional thermal conductivity and heat dissipation properties. The tape is specifically designed to help dissipate heat and improve heating and cooling efficiency while protecting temperature-sensitive materials from thermal damage. With its thermally conductive properties, the aluminum foil backing effectively conducts heat away from critical components, reducing hot spots and maintaining optimal operating temperatures.
This professional-grade tape offers superior durability and reliability in harsh industrial environments. The highly engineered acrylic adhesive provides long-term bonding strength while maintaining the ability to remove cleanly after masking applications, making it ideal for both temporary and permanent installations. The dead soft aluminum foil backing conforms easily to curved and uneven surfaces, ensuring complete coverage and optimal adhesion even on complex geometries. The tape withstands exposure to flame, weathering, moisture, and UV radiation, delivering excellent aging performance both indoors and outdoors. Classified by UL to UL 723 Class "L" for low flammability rating, it meets F.A.R 25.853(a) specifications, making it suitable for aerospace and aviation applications.
Recommended applications include heat shielding of delicate parts, heat reflecting surfaces, moisture barriers, light reflecting for enhanced lighting efficiency, seaming and sealing operations, refrigerator and freezer coil attachment, and plastic protection against heat and UV exposure. The tape operates reliably across a wide temperature range from -65°F to 300°F (-54°C to 149°C), ensuring consistent performance in both extreme cold and high-heat environments. Each case contains 16 rolls, providing substantial coverage for large-scale industrial projects.
Key Features
- Thermally conductive aluminum foil backing dissipates heat and improves heating/cooling efficiency
- Highly engineered acrylic adhesive provides long-term durability with clean removal after masking
- Dead soft aluminum foil conforms to curved and uneven surfaces for complete coverage
- Withstands flame, weathering, moisture, and UV exposure with excellent aging performance
- UL 723 Class L low flammability rated and meets F.A.R 25.853(a) specifications
- Heat and light reflective properties enhance lighting efficiency and surface protection
- Wide operating temperature range from -65°F to 300°F (-54°C to 149°C)
- Ideal for heat shielding, seaming, sealing, and refrigeration coil attachment applications
Technical Specifications
| Specification |
Value |
| Product Name | 3M Aluminum Foil Tape 431 |
| Part Number | 431 |
| 3M Product Number | 431 |
| 3M ID | 7100230545 |
| UPC Code | 00638060407875 |
| Color | Silver |
| Backing Material | Dead Soft Aluminum Foil |
| Adhesive Type | Acrylic Pressure-Sensitive |
| Overall Width (Metric) | 63 mm |
| Overall Width (Imperial) | 2.48 inches |
| Overall Length (Metric) | 55 meters |
| Overall Length (Imperial) | 180.446 feet |
| Backing Thickness (Metric) | 0.05 mm |
| Backing Thickness (Imperial) | 1.9 mil |
| Adhesive Thickness (Metric) | 0.05 mm |
| Adhesive Thickness (Imperial) | 1.8 mil |
| Tensile Strength (Metric) | 33.3 N/100mm |
| Tensile Strength (Imperial) | 19 lb/in |
| 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 |
| Rolls Per Case | 16 |
| Specifications Met | UL 723 Class L, FAR 25.853(a) |
| UL Rating | UL 723 Class L for Low Flammability |
| Brand | 3M |
| Application Type | Heat Shielding, Heat Reflecting, Sealing, Seaming, Moisture Barrier |
| Use Classification | Industrial/Occupational Use Only |
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