Premium aluminum foil tape with thermally conductive acrylic adhesive for heat shielding, chemical masking, and industrial sealing applications. UL-recognized, flame-retardant, and suitable for temperatures from -65°F to 300°F.
3M™ Aluminum Foil Tape 425 is a premium industrial-grade foil tape designed for demanding applications requiring heat dissipation, chemical resistance, and superior adhesion. Featuring a dead soft aluminum foil backing combined 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 materials, while maintaining a strong and reliable bond at temperatures ranging from -65°F to 300°F (-54°C to 149°C).
This versatile tape excels in heat shielding, heat reflecting, chemical masking, light enhancement, chemical milling, seaming, sealing, and de-paint operations. The 2.8 mil backing thickness with 1.8 mil acrylic adhesive provides optimal conformability to curved and uneven surfaces without compromising durability. Engineered to withstand exposure to flame, weathering, moisture, UV radiation, and harsh solvents, the tape maintains excellent work life both indoors and outdoors. With a shelf life of 24 months and UL recognition to UL 746C, plus UL classification to UL 723 Class L for low flammability rating, this tape meets stringent industry standards including FAR 25.853(a) and L-T-80C specifications.
The 300mm width and 55-meter length per roll provides substantial coverage for industrial applications. The tape's heat and light reflective properties enhance lighting efficiency and protect surfaces from thermal damage. Its clean removal capability after harsh masking applications makes it ideal for de-paint processes and temporary protection applications. Whether used for refrigerator and freezer coil attachment, wiring harness attachment, HVAC duct sealing, or engine heat shielding, 3M Aluminum Foil Tape 425 delivers consistent, professional-grade results.
Key Features
- Thermally conductive aluminum foil backing dissipates heat and protects temperature-sensitive materials
- Highly engineered acrylic adhesive provides long-term durability with clean removal after masking
- Resistant to chemicals, flame, weathering, moisture, and UV for harsh environment protection
- Dead soft aluminum foil conforms to curved and uneven surfaces for superior coverage
- UL recognized to UL 746C and classified to UL 723 Class L for low flammability rating
Technical Specifications
| Specification |
Value |
| Brand | 3M™ |
| Product Number | 425 |
| UPC | 00051125853828 |
| Backing Material | Aluminum Foil (Dead Soft) |
| Overall Width | 300 mm (11.81 inches) |
| Overall Length | 55 meters |
| Backing Thickness | 2.8 mil (0.07 mm) |
| Adhesive Thickness | 1.8 mil (0.05 mm) |
| Total Tape Thickness | 4.6 mil without liner |
| Adhesive Type | Pressure-Sensitive Acrylic |
| Product Color | Silver |
| Tensile Strength | 28 lb/in (49 N/100mm) |
| Elongation at Break | 6% |
| Maximum Operating Temperature | 300°F (149°C) |
| Minimum Operating Temperature | -65°F (-54°C) |
| Temperature Range | -65°F to 300°F (-54°C to 149°C) |
| Flame Retardant | Yes |
| Number of Adhesive Sides | Single-sided |
| Shelf Life | 24 Months |
| Smallest Saleable Unit | Roll |
| UL Recognition | UL 746C (File E 122798) |
| UL Classification | UL 723 Class L - Low Flammability Rating (File R 7311) |
| Specifications Met | FAR 25.853(a), L-T-80C, SAE-AMS-T-23397 |
| Industries Served | Aerospace, Appliance, Automotive, Construction, Electronics, General Industrial, Metalworking, Military & Government, Specialty Vehicles, Transportation |
| Applications | Heat shielding, heat reflecting, chemical masking, light enhancement, chemical milling, seaming, sealing, refrigerator and freezer coil attachment, HVAC duct sealing, wiring harness attachment, de-paint operations |
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