Premium thermally conductive aluminum foil tape with acrylic adhesive for heat shielding, chemical masking, and industrial sealing applications. 4 inch width, 60 yard length, temperature range -65°F to 300°F, UL rated for low flammability.
3M™ Aluminum Foil Tape 427 is a premium industrial-grade thermally conductive tape designed for demanding applications requiring heat dissipation and thermal protection. Featuring a dead soft aluminum foil backing with highly engineered acrylic adhesive, this linered version provides exceptional performance for heat shielding, chemical masking, and sealing applications. The tape measures 4 inches wide by 60 yards long with a 4.6 mil total thickness, making it ideal for die-cutting operations and precise applications across aerospace, automotive, appliance, and electronics industries.
This versatile foil tape excels at dissipating heat across its surface to reduce hot spots and protect sensitive substrates from high temperature exposure. With a temperature range from -65°F to 300°F (-54°C to 149°C), it withstands extreme thermal conditions while maintaining a strong, reliable bond. The acrylic adhesive formulation provides long-term durability and removes cleanly after harsh masking applications, making it suitable for chemical paint stripping, de-paint processes, and other demanding industrial operations.
The tape offers superior environmental resistance, withstanding exposure to flame, weathering, moisture, UV radiation, and various solvents. Its heat and light reflective properties enhance lighting efficiency and provide surface protection, while the dead soft aluminum backing conforms perfectly to curved and uneven surfaces. UL recognized to UL 746C and classified by UL to UL 723 Class L for low flammability, this professional-grade tape meets FAR 25.853(a) specifications and delivers reliable performance in both indoor and outdoor environments.
Key Features
- Thermally conductive aluminum foil backing dissipates heat and reduces hot spots for temperature sensitive material protection
- Highly engineered acrylic adhesive provides long-term durability with clean removal after harsh masking applications
- Resistant to chemicals, flame, weathering, moisture, and UV radiation for superior environmental performance
- Dead soft aluminum backing conforms to curved and uneven surfaces for perfect application coverage
- Heat and light reflective properties enhance lighting efficiency and protect surfaces from thermal damage
- 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 thermal conditions
- Linered version suitable for die-cutting applications and precision industrial operations
- Meets FAR 25.853(a) specifications for aerospace and aviation applications
- Ideal for heat shielding, chemical masking, sealing HVAC ductwork, and refrigerator coil attachment
Technical Specifications
| Specification |
Value |
| Product Number | 427 |
| Brand | 3M |
| Overall Width (Imperial) | 4 in |
| Overall Width (Metric) | 101.6 mm |
| Overall Length (Imperial) | 60 yd |
| Overall Length (Metric) | 54.86 m |
| Total Tape Thickness without Liner (Imperial) | 4.6 mil |
| Backing (Carrier) Thickness (Imperial) | 2.8 mil |
| Backing (Carrier) Thickness (Metric) | 0.07 mm |
| Back Side Adhesive Thickness (Imperial) | 1.8 mil |
| Back Side Adhesive Thickness (Metric) | 0.05 mm |
| Primary Liner | Easy Release Film |
| Primary Liner Thickness (Imperial) | 3.1 mil |
| Primary Liner Thickness (Metric) | 0.08 mm |
| Backing Material | Aluminum Foil - Dead Soft |
| Adhesive Type | Acrylic - Pressure Sensitive |
| Product Color | Silver |
| Elongation at Break | 6% |
| Tensile Strength (Imperial) | 28 lb/in |
| Tensile Strength (Metric) | 49 N/100mm |
| Maximum Operating Temperature (Fahrenheit) | 300°F |
| Maximum Operating Temperature (Celsius) | 149°C |
| Minimum Operating Temperature (Fahrenheit) | -65°F |
| Minimum Operating Temperature (Celsius) | -54°C |
| Smallest Saleable Unit | Roll |
| Package Configuration | 12 Roll/Case |
| UPC Code | 00051125855570 |
| 3M ID | 7010379735 |
| UL Recognition | UL 746C (File E 122798) |
| UL Classification | UL 723 Class L - Low Flammability |
| Specifications Met | FAR 25.853(a) |
| Industries Served | Aerospace, Appliance, Automotive, Construction, Electronics, General Industrial, Metalworking, Military, Specialty Vehicles, Transportation |
| Applications | Heat Shielding, Heat Reflecting, Chemical Masking, Moisture Barrier, Light Enhancement, Chemical Milling, Seaming and Sealing, Refrigerator and Freezer Coil Attachment, De-Paint Operations, HVAC Ductwork Sealing |
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