Premium 3M aluminum foil tape with thermally conductive backing and acrylic adhesive for heat shielding, sealing, and thermal management. UL 723 Class L rated, withstands -65°F to 300°F, ideal for industrial applications.
The 3M™ Aluminum Foil Tape 431 is a high-performance industrial adhesive tape engineered for superior heat dissipation and thermal management across diverse applications. 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. The tape excels in protecting temperature-sensitive materials by effectively dissipating heat over its surface to reduce hot spots and maintain substrate integrity.
This professional-grade tape demonstrates exceptional durability and environmental resistance, capable of withstanding exposure to high heat, humidity, moisture, weathering, UV radiation, and various solvents. With a temperature operating range from -65°F to 300°F (-54°C to 149°C), it maintains a strong and reliable bond under extreme conditions. The thermally conductive aluminum backing combined with the acrylic adhesive ensures long-term performance both indoors and outdoors, providing excellent aging characteristics and work life stability.
Classified by UL to UL 723 Class "L" for low flammability rating and meeting F.A.R 25.853(a) specifications, this tape is ideal for aerospace, automotive, HVAC, refrigeration, and industrial applications. The 24 roll case provides excellent value for high-volume users, with each roll measuring 2 inches wide by 60 yards long at 3.1 mil total thickness. Perfect for professional contractors, manufacturers, and industrial facilities requiring reliable thermal management solutions.
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 superior contact
- Withstands flame, weathering, moisture, and UV exposure for extended outdoor performance
- UL 723 Class L low flammability rating meets F.A.R 25.853(a) aerospace specifications
- Temperature range from -65°F to 300°F (-54°C to 149°C) for extreme conditions
- Heat and light reflective properties enhance lighting efficiency and surface protection
- Excellent aging performance both indoors and outdoors with reliable long-term adhesion
Technical Specifications
| Specification |
Value |
| Product Name | 3M Aluminum Foil Tape 431 |
| Part Number | 431 |
| UPC Code | 00051125853200 |
| Backing Material | Dead Soft Aluminum Foil |
| Adhesive Type | Acrylic Pressure-Sensitive |
| Overall Width (Imperial) | 2 inches |
| Overall Width (Metric) | 5.1 centimeters |
| Overall Length (Imperial) | 60 yards |
| Overall Length (Metric) | 54.9 meters |
| Backing Thickness (Imperial) | 1.9 mil |
| Backing Thickness (Metric) | 0.05 millimeters |
| Adhesive Thickness (Imperial) | 1.8 mil |
| Adhesive Thickness (Metric) | 0.05 millimeters |
| Total Thickness | 3.1 mil |
| Tensile Strength (Imperial) | 19 pounds per inch |
| Tensile Strength (Metric) | 33.3 Newtons per 100 millimeters |
| Product Color | Silver |
| 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 Operating Range | -65°F to 300°F (-54°C to 149°C) |
| Primary Liner | Easy Release Film |
| Smallest Saleable Unit | Roll |
| Case Quantity | 24 rolls per case |
| Brand | 3M™ |
| Shelf Life | 24 months |
| Specifications Met | FAR 25.853(a), UL 723 Class L |
| UL Classification | UL 723 Class L for low flammability |
| Flammability Rating | Low - Class L |
| Recommended Applications | Heat shielding, heat reflecting, moisture barrier, light reflecting, seaming, sealing, refrigerator coil attachment, plastic protection |
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