Premium thermally conductive aluminum foil tape with acrylic adhesive for heat shielding, chemical masking, and industrial sealing applications. 400mm width, 55m length, rated to 300°F with exceptional durability and clean removal.
3M™ Aluminum Foil Tape 425 is a premium industrial-grade thermal and chemical-resistant tape designed for demanding applications across aerospace, automotive, appliance, construction, electronics, and manufacturing industries. Featuring a dead soft aluminum foil backing combined with a highly engineered pressure-sensitive acrylic adhesive, this versatile tape delivers exceptional performance in heat shielding, heat reflecting, chemical masking, light enhancement, and sealing applications. The tape measures 400mm in width and provides 55 meters of coverage per roll with a total thickness of 4.6 mil, offering superior conformability to curved and uneven surfaces.
This thermally conductive tape excels at dissipating heat over its surface to reduce hot spots and protect temperature-sensitive materials and substrates from high-temperature effects. With a maximum operating temperature of 300°F (149°C) and minimum of -65°F (-54°C), the tape maintains a strong and reliable bond across extreme temperature ranges. The acrylic adhesive formulation provides long-term durability while removing cleanly after harsh masking applications, making it ideal for de-paint processes and other demanding industrial operations.
The tape is engineered to withstand exposure to flame, weathering, moisture, UV radiation, and various solvents, ensuring excellent work life both indoors and outdoors. UL Recognized to UL 746C (File E 122798) and Classified by UL to UL 723 "L" for low flammability rating (File R 7311), it meets F.A.R 25.853(a) specifications and L-T-80C requirements. With a 24-month shelf life and single-sided adhesive design, this professional-grade foil tape is an essential solution for heat shielding delicate parts, refrigerator and freezer coil attachment, splicing thin gauge foils, plastic protection, and moisture barrier applications.
Key Features
- Thermally conductive aluminum foil backing dissipates heat and reduces hot spots to protect temperature-sensitive materials
- Highly engineered acrylic adhesive provides long-term durability and clean removal after harsh masking applications
- Resistant to chemicals, flame, weathering, moisture, and UV exposure for reliable indoor and outdoor performance
- Dead soft aluminum foil backing conforms to curved and uneven surfaces for superior coverage and adhesion
- UL Recognized to UL 746C and Classified by UL to UL 723 Class L for low flammability with FAR 25.853(a) compliance
Technical Specifications
| Specification |
Value |
| Product Name | 3M Aluminum Foil Tape 425 |
| Part Number | 425 |
| UPC Code | 00051125853767 |
| Overall Width (Metric) | 400 mm |
| Overall Width (Imperial) | 15.75 inches |
| Overall Length (Metric) | 55 meters |
| Overall Length (Imperial) | 60 yards |
| Total Tape Thickness | 4.6 mil |
| Backing Material | Dead Soft Aluminum Foil |
| Backing Thickness (Metric) | 0.07 mm |
| Backing Thickness (Imperial) | 2.8 mil |
| Adhesive Thickness (Metric) | 0.05 mm |
| Adhesive Thickness (Imperial) | 1.8 mil |
| Adhesive Type | Pressure-Sensitive Acrylic |
| Adhesive Sides | Single-Sided |
| Product Color | Silver |
| Maximum Operating Temperature (Celsius) | 149°C |
| Maximum Operating Temperature (Fahrenheit) | 300°F |
| Minimum Operating Temperature (Celsius) | -54°C |
| Minimum Operating Temperature (Fahrenheit) | -65°F |
| Tensile Strength (Metric) | 49 N/100mm |
| Tensile Strength (Imperial) | 28 lb/in |
| Elongation at Break | 6% |
| Flame Retardant | Yes |
| Shelf Life | 24 Months |
| Smallest Saleable Unit | Roll |
| Quantity per Case | 1 Roll |
| UL Recognition | UL 746C (File E 122798) |
| UL Classification | UL 723 Class L - Low Flammability (File R 7311) |
| Specifications Met | FAR 25.853(a), L-T-80C, SAE-AMS-T-23397 |
| Brand | 3M |
| Industries | Aerospace, Appliance, Automotive, Construction, Electronics, General Industrial, Metalworking, Military & Government, Specialty Vehicles, Transportation |
| Recommended Applications | Heat shielding, Heat reflecting, Chemical masking, Paint stripping, Moisture barrier, Light enhancement, Chemical milling, Seaming, Sealing, HVAC duct work, Refrigerator and freezer coil attachment, Splicing thin gauge foils, Plastic protection, Wiring harness attachment |
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