Premium industrial aluminum foil tape with thermally conductive backing, acrylic adhesive, and excellent chemical and heat resistance for professional masking, sealing, and heat shielding applications.
3M™ Aluminum Foil Tape 427 is a premium industrial adhesive tape engineered for demanding applications across aerospace, automotive, appliance, construction, electronics, and metalworking industries. This linered version of the 3M™ Aluminum Foil Tape 425 features a dead soft aluminum foil backing with a highly engineered pressure-sensitive acrylic adhesive, making it ideal for heat shielding, heat reflecting, chemical masking, light enhancement, chemical milling, seaming, sealing, and de-paint operations. The tape measures 6 inches wide by 360 yards long with a total thickness of 4.6 mils, providing excellent coverage for large-scale industrial projects.
The thermally conductive aluminum backing effectively dissipates heat over the tape surface to reduce hot spots and protect temperature-sensitive substrates from high-temperature effects. With a backing thickness of 2.8 mils and an adhesive thickness of 1.8 mils, this tape maintains a strong and reliable bond while withstanding exposure to high heat, humidity, moisture, weathering, UV radiation, and various solvents. The tape operates reliably within a temperature range of -65°F to 300°F (-54°C to 149°C), making it suitable for both indoor and outdoor applications.
Recognized by UL to UL 746C (File E 122798) and classified by UL to UL 723 Class "L" for low flammability rating, this professional-grade tape meets FAR 25.853(a) specifications and can be certified to L-T-80C standards. Its easy-release film liner (3.1 mils thick) makes it perfect for die-cutting applications, while the highly engineered acrylic adhesive provides long-term durability and removes cleanly after harsh masking applications. The silver aluminum backing is both heat and light reflective, enhancing lighting efficiency and protecting surfaces from thermal and light damage.
Key Features
- Thermally conductive aluminum foil backing dissipates heat and protects temperature-sensitive materials
- Highly engineered acrylic adhesive provides long-term durability and clean removal after harsh applications
- Resistant to chemicals, moisture, weathering, UV radiation, and solvents for indoor and outdoor use
- Dead soft aluminum backing conforms to curved and uneven surfaces for seamless application
- UL recognized and classified for low flammability with heat and light reflective properties
Technical Specifications
| Specification |
Value |
| Product Name | 3M™ Aluminum Foil Tape 427 |
| Part Number | 427 |
| UPC Code | 00051125853859 |
| Overall Width | 6 inches (152.4 mm) |
| Overall Length | 360 yards (329.184 m) |
| Total Tape Thickness | 4.6 mils |
| Backing Material | Aluminum Foil (Dead Soft) |
| Backing Thickness | 2.8 mils (0.07 mm) |
| Adhesive Type | Pressure-Sensitive Acrylic |
| Adhesive Thickness | 1.8 mils (0.05 mm) |
| Primary Liner | Easy Release Film (3.1 mils / 0.08 mm) |
| Product Color | Silver |
| Elongation at Break | 6% |
| Tensile Strength | 28 lb/in (49 N/100mm) |
| Operating Temperature Range | -65°F to 300°F (-54°C to 149°C) |
| Minimum Operating Temperature | -65°F (-54°C) |
| Maximum Operating Temperature | 300°F (149°C) |
| UL Recognition | UL 746C (File E 122798) |
| UL Classification | UL 723 Class L (Low Flammability) |
| FAR Compliance | FAR 25.853(a) |
| Specifications Met | FAR 25.853(a), L-T-80C Certified |
| Smallest Saleable Unit | 1 Roll per Case |
| Brand | 3M™ |
| Industries Served | Aerospace, Appliance, Automotive, Construction, Electronics, General Industrial, Metalworking, Military, Military & Government, Specialty Vehicles, Transportation |
| Primary Applications | Heat shielding, Heat reflecting, Chemical masking, Light enhancement, Chemical milling, Seaming, Sealing, De-paint operations |
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