Premium industrial aluminum foil tape with thermally conductive acrylic adhesive for heat shielding, chemical masking, and thermal protection applications. Temperature rated -65°F to 300°F with UL certification.
3M™ Aluminum Foil Tape 425 is a premium industrial-grade foil tape engineered for demanding applications across aerospace, automotive, appliance, construction, electronics, and general industrial sectors. This versatile tape features a dead soft aluminum foil backing combined with a highly engineered acrylic adhesive formulation that provides exceptional thermal conductivity and chemical resistance. The tape is specifically designed to dissipate heat effectively, improve heating and cooling efficiency, and protect temperature-sensitive materials from thermal damage.
With a backing thickness of 2.8 mil (0.07mm) and total tape thickness of 4.6 mil, this 2-inch wide by 60-yard roll delivers reliable performance in heat shielding, heat reflecting, chemical masking, light enhancement, chemical milling, seaming, and sealing applications. The thermally conductive properties help reduce hot spots and protect substrates from high-temperature effects, while maintaining a strong bond even when exposed to extreme conditions. The tape withstands temperatures ranging from -65°F to 300°F (-54°C to 149°C) and resists moisture, weathering, UV exposure, and solvents.
This professional-grade tape is UL Recognized to UL 746C and classified by UL to UL 723 Class "L" for low flammability rating, meeting FAR 25.853(a) and L-T-80C specifications. Each case contains 24 rolls, making it ideal for high-volume industrial operations, manufacturing facilities, and specialized applications requiring consistent quality and performance. The acrylic adhesive formulation ensures long-term durability while removing cleanly after harsh masking applications, making it equally suitable for temporary protection and permanent bonding needs.
Key Features
- Thermally conductive aluminum foil backing dissipates heat and improves HVAC efficiency
- Highly engineered acrylic adhesive provides long-term durability and clean removal after masking
- Resistant to chemicals, moisture, weathering, UV exposure, and solvents for extended outdoor use
- UL recognized to UL 746C and classified to UL 723 Class L for low flammability rating
- Dead soft aluminum backing conforms to curved and uneven surfaces for seamless application
- Temperature resistant from -65°F to 300°F with 24-month shelf life
- Ideal for heat shielding, refrigerator coil attachment, seaming, sealing, and light enhancement
- Single-sided adhesive design with 28 lb/in tensile strength for reliable bonding
- Available in 24-roll cases for high-volume industrial operations
- Meets FAR 25.853(a) and L-T-80C specifications for aerospace and industrial applications
Technical Specifications
| Specification |
Value |
| Product Number | 425 |
| Brand | 3M™ |
| Backing Material | Dead Soft Aluminum Foil |
| Adhesive Type | Acrylic |
| Product Color | Silver |
| Overall Width (Imperial) | 2 in |
| Overall Width (Metric) | 5.1 cm |
| Overall Length (Imperial) | 60 yd |
| Overall Length (Metric) | 54.86 m |
| Backing Thickness (Imperial) | 2.8 mil |
| Backing Thickness (Metric) | 0.07 mm |
| Adhesive Thickness (Imperial) | 1.8 mil |
| Adhesive Thickness (Metric) | 0.05 mm |
| Total Tape Thickness (Imperial) | 4.6 mil |
| Tensile Strength (Imperial) | 28 lb/in |
| Tensile Strength (Metric) | 49 N/100mm |
| Elongation at Break | 6% |
| Number of Adhesive Sides | Single-sided |
| Maximum Operating Temperature (Fahrenheit) | 300°F |
| Maximum Operating Temperature (Celsius) | 149°C |
| Minimum Operating Temperature (Fahrenheit) | -65°F |
| Minimum Operating Temperature (Celsius) | -54°C |
| Case Quantity | 24 Rolls per Case |
| Smallest Saleable Unit | Roll |
| Shelf Life | 24 Months |
| Flame Retardant | Yes |
| Specifications Met | FAR 25.853(a), L-T-80C, SAE-AMS-T-23397 |
| UL Recognition | UL 746C (File E 122798) |
| UL Classification | UL 723 Class L for Low Flammability |
| UPC Code | 00051125853118 |
| 3M ID | 7100053630 |
| Applications | Heat Shielding, Heat Reflecting, Chemical Masking, Light Enhancement, Chemical Milling, Seaming, Sealing, Refrigerator and Freezer Coil Attachment, HVAC Duct Work, Wiring Harness Attachment |
| Industries | Aerospace, Appliance, Automotive, Construction, Electronics, General Industrial, Metalworking, Military & Government, Specialty Vehicles, Transportation |
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