Premium industrial aluminum foil tape with thermally conductive acrylic adhesive for heat shielding, chemical masking, and sealing applications. Withstands extreme temperatures from -65°F to 300°F with superior durability and clean removal. UL recognized and flame retardant.
3M™ Aluminum Foil Tape 425 is a premium industrial-grade foil tape designed for demanding applications across aerospace, automotive, appliance, construction, electronics, and manufacturing industries. Comprised of a dead soft aluminum foil backing with a highly engineered pressure-sensitive acrylic adhesive, this tape excels in heat shielding, heat reflecting, chemical masking, light enhancement, chemical milling, seaming, sealing, and de-paint operations. The thermally conductive aluminum backing effectively dissipates heat over the tape surface to reduce hot spots and protect substrates from high temperature effects.
This professional-grade tape withstands exposure to extreme temperatures ranging from -65°F to 300°F (-54°C to 149°C) while maintaining a strong and reliable bond. The highly engineered acrylic adhesive provides long-term durability and removes cleanly after harsh masking applications, making it ideal for both indoor and outdoor use. The tape resists chemicals, moisture, weathering, UV exposure, and solvents, ensuring excellent work life in demanding environments. It 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 of 2-inch wide tape with 60-yard length per roll, providing 1,440 total yards of coverage. The dead soft aluminum foil backing conforms easily to curved and uneven surfaces, making installation straightforward on complex geometries. Recommended applications include heat shielding of delicate parts, heat reflecting, masking in chemical paint stripping, moisture barriers, light reflecting for enhancement, chemical milling, seaming and sealing, refrigerator and freezer coil attachment, splicing of thin gauge foils, and plastic protection.
Key Features
- Thermally conductive aluminum backing dissipates heat and reduces hot spots on temperature-sensitive materials
- Highly engineered acrylic adhesive provides long-term durability while removing cleanly after harsh masking applications
- Resistant to chemicals, moisture, weathering, UV exposure, and solvents for reliable performance indoors and outdoors
- Dead soft aluminum foil backing conforms to curved and uneven surfaces for easy installation
- UL Recognized to UL 746C and Classified to UL 723 Class L for low flammability with FAR 25.853(a) compliance
- Operates reliably at extreme temperatures from -65°F to 300°F (-54°C to 149°C)
- Heat and light reflective properties enhance lighting efficiency and protect sensitive components
- Ideal for aerospace, automotive, appliance, construction, electronics, and general industrial applications
Technical Specifications
| Specification |
Value |
| Product Name | 3M™ Aluminum Foil Tape 425, Silver, LM MMSJ434 |
| Part Number | 425 |
| 3M Product Number | 425 |
| 3M ID | 7010378535 |
| UPC | 00051128998748 |
| Backing Material | Dead Soft Aluminum Foil |
| Adhesive Type | Acrylic, Pressure-Sensitive |
| Adhesive Thickness (Imperial) | 1.8 mil |
| Adhesive Thickness (Metric) | 0.05 mm |
| Backing Thickness (Imperial) | 2.8 mil |
| Backing Thickness (Metric) | 0.07 mm |
| Total Tape Thickness (Imperial) | 4.6 mil |
| Overall Width (Imperial) | 2 in |
| Overall Width (Metric) | 50.8 mm |
| Overall Length (Imperial) | 60 yd |
| Overall Length (Metric) | 54.86 m |
| Tensile Strength (Imperial) | 28 lb/in |
| Tensile Strength (Metric) | 49 N/100mm |
| Elongation at Break | 6% |
| Product Color | Silver |
| Number of Adhesive Sides | Single-sided |
| Minimum Operating Temperature (Fahrenheit) | -65 °F |
| Minimum Operating Temperature (Celsius) | -54 °C |
| Maximum Operating Temperature (Fahrenheit) | 300 °F |
| Maximum Operating Temperature (Celsius) | 149 °C |
| Flame Retardant | Yes |
| Shelf Life | 24 Months |
| Smallest Saleable Unit | Roll |
| Rolls per Case | 24 |
| Total Coverage per Case | 1,440 yards (1,317.4 meters) |
| Specifications Met | FAR 25.853(a), L-T-80C, SAE-AMS-T-23397 |
| UL Certifications | UL Recognized to UL 746C (File E 122798), Classified by UL to UL 723 Class L |
| Brand | 3M™ |
| Industries | Aerospace, Appliance, Automotive, Construction, Electronics, General Industrial, Metalworking, Military & Government, Specialty Vehicles, Transportation |
| Recommended Applications | Heat shielding, Heat reflecting, Chemical masking, Moisture barrier, Light reflecting, Chemical milling, Seaming and sealing, Refrigerator and freezer coil attachment, Splicing, Plastic protection |
| Use Type | Industrial/Occupational Use Only - Not for Consumer Sale |
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