Premium thermally conductive aluminum foil tape with acrylic adhesive for industrial heat shielding, chemical masking, and high-temperature applications up to 300°F with UL flame retardant certification.
3M™ Aluminum Foil Tape 425 is a premium thermally conductive foil tape designed for industrial applications requiring superior heat dissipation and chemical resistance. Featuring a dead soft aluminum foil backing coated with a highly engineered pressure-sensitive acrylic adhesive, this versatile tape delivers exceptional performance across diverse industries including aerospace, automotive, construction, electronics, and general manufacturing. The tape's thermally conductive properties help dissipate heat and improve heating and cooling efficiency while protecting temperature-sensitive materials from thermal damage.
This industrial-grade tape is engineered to withstand extreme conditions including high temperatures up to 300°F (149°C), harsh chemical environments, moisture exposure, weathering, and UV radiation. The dead soft aluminum foil backing conforms seamlessly to curved and uneven surfaces, making it ideal for complex applications. With a single-sided acrylic adhesive design, the tape provides long-term durability while maintaining clean removability after harsh masking applications, making it perfect for de-paint operations and chemical stripping processes.
3M™ Aluminum Foil Tape 425 meets rigorous industry standards and certifications including UL recognition to UL 746C (File E 122798) and UL classification to UL 723 Class "L" for low flammability rating (File R 7311). The tape also meets FAR 25.853(a), L-T-80C, and SAE-AMS-T-23397 specifications, ensuring compliance with aerospace and military requirements. With a 24-month shelf life and sold as individual rolls, this professional-grade tape is ideal for heat shielding, heat reflecting, masking, light enhancement, chemical milling, seaming, sealing, and refrigerator/freezer coil attachment applications.
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 harsh masking
- Chemical resistant backing protects surfaces during de-paint and chemical masking operations
- Dead soft aluminum foil conforms to curved and uneven surfaces for seamless application
- UL recognized and classified for low flammability with temperature range -65°F to 300°F (-54°C to 149°C)
- Withstands exposure to flame, weathering, moisture, UV, and solvents for indoor/outdoor use
- Heat and light reflective properties enhance lighting efficiency and thermal protection
- Single-sided pressure-sensitive adhesive for versatile industrial applications
Technical Specifications
| Specification |
Value |
| Product Name | 3M™ Aluminum Foil Tape 425 |
| Part Number | 425 |
| 3M Product Number | 425 |
| 3M ID | 7100000061 |
| Backing Material | Dead Soft Aluminum Foil |
| Backing Thickness (Imperial) | 2.8 mil |
| Backing Thickness (Metric) | 0.07 mm |
| Total Tape Thickness without Liner | 4.6 mil |
| Adhesive Type | Acrylic, Pressure-Sensitive |
| Adhesive Thickness (Imperial) | 1.8 mil |
| Adhesive Thickness (Metric) | 0.05 mm |
| Number of Adhesive Sides | Single-Sided |
| Product Color | Silver |
| 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 |
| Temperature Use Range | -65°F to 300°F (-54°C to 149°C) |
| Flame Retardant | Yes |
| Shelf Life | 24 Months |
| Smallest Saleable Unit | Roll |
| Units per Case | 1.0 |
| Brand | 3M™ |
| UL Recognition | UL 746C (File E 122798) |
| UL Classification | UL 723 Class L for Low Flammability (File R 7311) |
| Specifications Met | FAR 25.853(a), L-T-80C, SAE-AMS-T-23397 |
| Industries | Aerospace, Appliance, Automotive, Construction, Electronics, General Industrial, Metalworking, Military & Government, Specialty Vehicles, Transportation |
| Recommended Applications | Heat shielding, Heat reflecting, Masking in chemical paint stripping, Moisture barrier, Light reflecting, Chemical milling, Seaming and sealing, Refrigerator and freezer coil attachment, Splicing of thin gauge foils, Plastic protection |
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