Industrial-grade aluminum foil tape with thermally conductive acrylic adhesive for heat shielding, chemical masking, and thermal protection applications across aerospace, automotive, and manufacturing industries.
3M™ Aluminum Foil Tape 427 is a premium industrial-grade adhesive tape designed for demanding applications requiring heat dissipation, chemical resistance, and superior durability. This linered version of the 3M™ Aluminum Foil Tape 425 features a dead soft aluminum foil backing combined with a highly engineered pressure-sensitive acrylic adhesive that provides exceptional thermal conductivity and chemical resistance. The tape measures 16 inches in width and 60 yards in length with a total thickness of 4.6 mils, making it ideal for both large-scale industrial applications and precision work requiring die-cutting capabilities.
The thermally conductive aluminum backing effectively dissipates heat across the tape surface to reduce hot spots and protect temperature-sensitive substrates from high-temperature exposure. With a temperature use range from -65°F to 300°F (-54°C to 149°C), this tape maintains a strong, reliable bond under extreme thermal conditions while withstanding exposure to moisture, weathering, UV radiation, and various solvents. The dead soft aluminum foil backing conforms seamlessly to curved and uneven surfaces, providing excellent coverage for complex geometries.
3M™ Aluminum Foil Tape 427 is recognized by UL to UL 746C (File E 122798) and classified by UL to UL 723 Class "L" for low flammability rating (File R 7311), meeting FAR 25.853(a) specifications. This versatile tape is widely used across aerospace, automotive, appliance, construction, electronics, and general industrial sectors for heat shielding, heat reflecting, chemical masking, light enhancement, chemical milling, seaming, sealing, refrigerator and freezer coil attachment, and de-paint operations.
Key Features
- Thermally conductive dead soft aluminum foil backing effectively dissipates heat and reduces hot spots on temperature-sensitive substrates
- Highly engineered pressure-sensitive acrylic adhesive provides superior durability and long-term bond strength under extreme conditions
- Linered design with easy-release film backing enables precision die-cutting applications for industrial manufacturing
- Chemical resistant formulation protects surfaces during de-paint processes, paint stripping, and chemical masking operations
- Withstands extreme temperature range from -65°F to 300°F with excellent resistance to moisture, UV, weathering, and solvents
- UL recognized to UL 746C and classified UL 723 Class L for low flammability with FAR 25.853(a) compliance
- Dead soft aluminum backing conforms to curved and uneven surfaces for complete coverage
- Heat and light reflective properties enhance lighting efficiency and provide thermal protection
- Suitable for diverse applications including HVAC sealing, refrigerator coil attachment, and wiring harness protection
Technical Specifications
| Specification |
Value |
| Product Name | 3M™ Aluminum Foil Tape 427 |
| Part Number | 427 |
| 3M Product Number | 427 |
| UPC Code | 00051125855037 |
| Product Color | Silver |
| Backing Material | Aluminum Foil |
| Adhesive Type | Acrylic, Pressure-Sensitive |
| Overall Width (Imperial) | 16 inches |
| Overall Width (Metric) | 406.4 millimeters |
| Overall Length (Imperial) | 60 yards |
| Overall Length (Metric) | 54.86 meters |
| Total Tape Thickness without Liner | 4.6 mils |
| Backing Thickness (Imperial) | 2.8 mils |
| Backing Thickness (Metric) | 0.07 millimeters |
| Adhesive Thickness (Imperial) | 1.8 mils |
| Adhesive Thickness (Metric) | 0.05 millimeters |
| Primary Liner | Easy Release Film |
| Liner Thickness (Imperial) | 3.1 mils |
| Liner Thickness (Metric) | 0.08 millimeters |
| Tensile Strength (Imperial) | 28 pounds per inch |
| Tensile Strength (Metric) | 49 Newtons per 100mm |
| Elongation at Break | 6 percent |
| Minimum Operating Temperature | -65°F (-54°C) |
| Maximum Operating Temperature | 300°F (149°C) |
| Temperature Use Range | -65°F to 300°F (-54°C to 149°C) |
| 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) |
| Thermal Conductivity | Thermally conductive for heat dissipation |
| Chemical Resistance | Resistant to chemicals, moisture, weathering, UV, and solvents |
| Industries Served | Aerospace, Appliance, Automotive, Construction, Electronics, General Industrial, Metalworking, Military, Specialty Vehicles, Transportation |
| Applications | Heat shielding, heat reflecting, chemical masking, light enhancement, chemical milling, seaming, sealing, HVAC ductwork, refrigerator coil attachment, de-paint operations |
| Brand | 3M™ |
| Product Type | Foil Tape |
| Tape Category | Aluminum Foil Tape |
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