High-performance thermally conductive aluminum foil tape with acrylic adhesive for heat shielding, heat reflecting, and sealing applications. Conforms to curved surfaces, withstands extreme temperatures -65°F to 300°F, and meets UL 723 Class L flammability standards. 72 rolls per case.
The 3M™ Aluminum Foil Tape 431 is a high-performance thermal and reflective tape engineered for demanding industrial applications across multiple industries. Featuring a dead soft aluminum foil backing with a highly engineered pressure-sensitive acrylic adhesive, this tape delivers exceptional thermal conductivity and heat dissipation capabilities. The tape's thermally conductive properties help dissipate heat over the surface to reduce hot spots and protect temperature-sensitive substrates from high-temperature effects. With its superior engineering, the tape maintains strong and reliable bonding while withstanding exposure to high heat, humidity, moisture, weathering, UV radiation, and various solvents.
This versatile foil tape is specifically designed for heat shielding, heat reflecting, light enhancement, seaming, and sealing applications. The dead soft aluminum backing conforms easily to curved and uneven surfaces, making it ideal for complex geometries and intricate assembly requirements. The highly engineered acrylic adhesive provides long-term durability and reliability while maintaining the ability to remove cleanly after harsh masking applications. The 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 other regulated industries.
With excellent aging performance both indoors and outdoors, the 3M™ Aluminum Foil Tape 431 operates reliably across an extended temperature range from -65°F to 300°F (-54°C to 149°C). Recommended applications include heat shielding of delicate parts, refrigerator and freezer coil attachment, plastic protection against heat and UV exposure, moisture barrier applications, and light reflecting for enhanced lighting efficiency. Each case contains 72 rolls, providing ample supply for production environments and high-volume applications.
Key Features
- Thermally conductive aluminum foil backing dissipates heat and reduces hot spots for temperature-sensitive material protection
- Highly engineered acrylic adhesive provides long-term durability with clean removal after harsh masking applications
- Dead soft aluminum foil backing conforms to curved and uneven surfaces for complex geometries
- Withstands extreme temperatures from -65°F to 300°F with excellent performance in high heat and humidity environments
- Classified by UL to UL 723 Class L for low flammability rating and meets F.A.R 25.853(a) aerospace specifications
Technical Specifications
| Specification |
Value |
| Brand | 3M™ |
| Product Number | 431 |
| UPC Code | 00051138953201 |
| Backing Material | Aluminum Foil (Dead Soft) |
| Adhesive Type | Acrylic (Pressure Sensitive) |
| Overall Width (Metric) | 12 mm |
| Overall Width (Imperial) | 0.47 in |
| 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 |
| Product Color | Silver |
| 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 |
| Rolls Per Case | 72 |
| Smallest Saleable Unit | Roll |
| Shelf Life | 24 months |
| Specifications Met | FAR 25.853(a), UL 723 Class L |
| UL Classification | UL 723 Class L (Low Flammability) |
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