Premium industrial aluminum foil tape with thermally conductive acrylic adhesive, ideal for heat shielding, chemical masking, and high-temperature applications up to 300°F. UL rated for low flammability. 96 rolls per case.
3M™ Aluminum Foil Tape 425 is a premium industrial-grade foil tape engineered for demanding applications requiring heat dissipation, chemical resistance, and superior adhesion. Comprised of dead soft aluminum foil backing and coated with a highly engineered pressure-sensitive acrylic adhesive, this tape delivers exceptional performance across aerospace, automotive, construction, and electronics industries. The thermally conductive aluminum backing effectively dissipates heat to reduce hot spots and protect temperature-sensitive substrates, while maintaining a strong and reliable bond even when exposed to high temperatures up to 300°F (149°C) and high humidity environments.
This versatile tape is specifically designed for heat shielding, heat reflecting, chemical masking, light enhancement, chemical milling, seaming, sealing, and de-paint operations. The dead soft aluminum foil backing conforms easily to curved and uneven surfaces, ensuring complete coverage and superior adhesion. The acrylic adhesive provides long-term durability while removing cleanly after harsh masking applications, making it ideal for temporary holding and protective applications. The tape withstands exposure to flame, weathering, moisture, and UV radiation, providing excellent work life both indoors and outdoors.
UL Recognized to UL 746C (File E 122798) and Classified by UL to UL 723 Class "L" for low flammability rating, this tape meets stringent safety standards including FAR 25.853(a) and L-T-80C specifications. Each case contains 96 rolls, with each roll measuring 1/4 inch wide by 60 yards long with a total tape thickness of 4.6 mil, making it an economical choice for high-volume industrial operations. The 24-month shelf life ensures product reliability and performance consistency throughout its storage period.
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
- Resistant to chemicals, flame, weathering, moisture, and UV for outdoor and indoor use
- Dead soft aluminum backing conforms to curved and uneven surfaces for superior coverage
- UL Recognized to UL 746C and Classified UL 723 Class L for low flammability rating
- Temperature range from -65°F to 300°F (-54°C to 149°C) for extreme environments
- Meets FAR 25.853(a) and L-T-80C specifications for aerospace applications
- Heat and light reflective properties enhance lighting efficiency and thermal protection
Technical Specifications
| Specification |
Value |
| Brand | 3M™ |
| Part Number | 425 |
| UPC | 00638060407653 |
| Product Color | Silver |
| Backing Material | Aluminum Foil (Dead Soft) |
| Adhesive Type | Acrylic (Pressure-Sensitive) |
| Backing Thickness (Imperial) | 2.8 mil |
| Backing Thickness (Metric) | 0.07 mm |
| Adhesive Thickness (Imperial) | 1.8 mil |
| Adhesive Thickness (Metric) | 0.05 mm |
| Overall Width (Imperial) | 0.25 in (1/4 inch) |
| Overall Width (Metric) | 6.35 mm |
| Overall Length (Imperial) | 60 yd |
| Overall Length (Metric) | 54.864 m |
| Total Tape Thickness (Imperial) | 4.6 mil |
| Tensile Strength (Imperial) | 28 lb/in |
| Tensile Strength (Metric) | 49 N/100mm |
| Elongation at Break | 6% |
| Maximum Operating Temperature (Fahrenheit) | 300°F |
| Maximum Operating Temperature (Celsius) | 149°C |
| Minimum Operating Temperature (Fahrenheit) | -65°F |
| Minimum Operating Temperature (Celsius) | -54°C |
| Flame Retardant | Yes |
| Number of Adhesive Sides | Single-Sided |
| Shelf Life | 24 Months |
| Smallest Saleable Unit | Roll |
| Quantity per Case | 96 Rolls |
| UL Recognition | UL 746C (File E 122798) |
| UL Classification | UL 723 Class L (Low Flammability) |
| Specifications Met | FAR 25.853(a), L-T-80C, SAE-AMS-T-23397 |
| Applications | Heat Shielding, Heat Reflecting, Chemical Masking, Light Enhancement, Chemical Milling, Seaming, Sealing, De-Paint Operations, HVAC Duct Work, Refrigerator and Freezer Coil Attachment, Wiring Harness Attachment |
| Industries | Aerospace, Appliance, Automotive, Construction, Electronics, General Industrial, Metalworking, Military & Government, Specialty Vehicles, Transportation |
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