Premium industrial aluminum foil tape with thermally conductive acrylic adhesive, ideal for heat shielding, chemical masking, and HVAC sealing applications. Temperature rated to 300°F with UL certification.
3M™ Aluminum Foil Tape 425 is a premium industrial-grade foil tape designed for demanding applications across aerospace, automotive, construction, and electronics industries. Comprised of a dead soft aluminum foil backing and coated with a highly engineered pressure-sensitive acrylic adhesive, this versatile tape delivers exceptional performance in heat shielding, heat reflecting, chemical masking, and sealing applications. The thermally conductive aluminum backing effectively dissipates heat to reduce hot spots and protect temperature-sensitive substrates from high temperature exposure up to 300°F (149°C).
This professional-grade tape is engineered to withstand extreme environmental conditions including high humidity, moisture, weathering, UV exposure, and chemical solvents while maintaining a strong and reliable bond. The acrylic adhesive formulation provides long-term durability and clean removal after harsh masking applications, making it ideal for chemical paint stripping, de-paint operations, and precision manufacturing processes. With a temperature operating range from -65°F to 300°F (-54°C to 149°C), this tape performs reliably in both indoor and outdoor environments.
3M™ Aluminum Foil Tape 425 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 48 rolls, making it economical for high-volume industrial operations. The tape's dead soft aluminum construction conforms easily to curved and uneven surfaces, providing superior coverage for complex applications including refrigerator and freezer coil attachment, wiring harness attachment, and HVAC duct sealing.
Key Features
- Thermally conductive dead soft aluminum foil backing dissipates heat and reduces hot spots
- Highly engineered acrylic adhesive provides long-term durability and clean removal
- Resistant to chemicals, moisture, weathering, UV exposure, and solvents
- Temperature rated -65°F to 300°F (-54°C to 149°C) for extreme environments
- UL Recognized to UL 746C and Classified UL 723 Class L for low flammability
- Conforms easily to curved and uneven surfaces for superior coverage
- Ideal for heat shielding, heat reflecting, chemical masking, and HVAC sealing
- 24-month shelf life with single-sided adhesive application
Technical Specifications
| Specification |
Value |
| Product Number | 425 |
| Brand | 3M™ |
| Product Color | Silver |
| Backing Material | Aluminum Foil (Dead Soft) |
| Adhesive Type | Acrylic, Pressure-Sensitive |
| Overall Width (Metric) | 12 mm |
| Overall Width (Imperial) | 0.472 in |
| Overall Length (Metric) | 55 m |
| Overall Length (Imperial) | 60.149 yd |
| Backing Thickness (Metric) | 0.07 mm |
| Backing Thickness (Imperial) | 2.8 mil |
| Adhesive Thickness (Metric) | 0.05 mm |
| Adhesive Thickness (Imperial) | 1.8 mil |
| Total Tape Thickness (Imperial) | 4.6 mil |
| Tensile Strength (Metric) | 49 N/100mm |
| Tensile Strength (Imperial) | 28 lb/in |
| Elongation at Break | 6% |
| Minimum Operating Temperature (Celsius) | -54°C |
| Minimum Operating Temperature (Fahrenheit) | -65°F |
| Maximum Operating Temperature (Celsius) | 149°C |
| Maximum Operating Temperature (Fahrenheit) | 300°F |
| Flame Retardant | Yes |
| Number of Adhesive Sides | Single-Sided |
| Shelf Life | 24 Months |
| Smallest Saleable Unit | Roll |
| Quantity per Case | 48 Rolls |
| UPC Code | 00638060407646 |
| 3M ID | 7100229093 |
| Specifications Met | FAR 25.853(a), L-T-80C, SAE-AMS-T-23397, UL 746C, UL 723 Class L |
| Applications | Heat shielding, Heat reflecting, Chemical masking, Moisture barrier, Light reflecting, Chemical milling, Seaming and sealing, Refrigerator and freezer coil attachment, Splicing, Plastic protection, HVAC duct sealing, Wiring harness attachment |
| Industries | Aerospace, Appliance, Automotive, Construction, Electronics, General Industrial, Metalworking, Military & Government, Specialty Vehicles, Transportation |
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