Premium 8-inch aluminum foil tape with thermally conductive backing for heat shielding, chemical masking, and industrial sealing applications. Delivers superior performance with acrylic adhesive, UL-rated flame resistance, and wide temperature range.
3M™ Aluminum Foil Tape 427 is a premium industrial-grade foil tape designed for demanding applications across aerospace, automotive, appliance, construction, electronics, and manufacturing industries. 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, making it ideal for heat shielding, heat reflecting, chemical masking, light enhancement, chemical milling, seaming, sealing, and de-paint operations. The tape measures 8 inches wide by 60 yards long with a total thickness of 4.6 mil, providing substantial coverage for large-scale industrial projects.
The thermally conductive aluminum backing effectively dissipates heat over the tape's surface, reducing hot spots and protecting sensitive substrates from high-temperature effects. The dead soft aluminum foil conforms easily to curved and uneven surfaces, ensuring complete coverage and superior adhesion. With a backing thickness of 2.8 mil and an adhesive thickness of 1.8 mil, this tape delivers robust performance while maintaining flexibility. The highly engineered acrylic adhesive provides long-term durability and reliably removes cleanly after harsh masking applications, making it perfect for de-paint processes and other demanding chemical operations.
This professional-grade tape withstands exposure to flame, weathering, moisture, and UV radiation, with an operating temperature range from -65°F to 300°F (-54°C to 149°C). It is UL Recognized to UL 746C and classified by UL to UL 723 Class "L" for low flammability rating, meeting FAR 25.853(a) specifications. The silver-colored tape features easy-release film primary liner at 3.1 mil thickness, facilitating smooth application. With tensile strength of 28 lb/in and 6% elongation at break, this tape combines strength with flexibility for superior performance in the most challenging industrial environments.
Key Features
- Thermally conductive aluminum foil backing dissipates heat and improves heating/cooling efficiency
- Dead soft aluminum conforms to curved and uneven surfaces for complete coverage
- Highly engineered acrylic adhesive provides long-term durability and clean removal
- Withstands flame, weathering, moisture, and UV exposure for extended outdoor use
- UL Recognized to UL 746C and classified UL 723 Class L for low flammability
Technical Specifications
| Specification |
Value |
| Product Number | 427 |
| Brand | 3M™ |
| Color | Silver |
| Overall Width (Imperial) | 8 in |
| Overall Width (Metric) | 203.2 mm |
| Overall Length (Imperial) | 60 yd |
| Overall Length (Metric) | 54.86 m |
| Total Tape Thickness without Liner (Imperial) | 4.6 mil |
| Backing (Carrier) Material | Aluminum Foil |
| 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 |
| Adhesive Type | Acrylic |
| Primary Liner | Easy Release Film |
| Primary Liner Thickness (Imperial) | 3.1 mil |
| Primary Liner Thickness (Metric) | 0.08 mm |
| Tensile Strength (Imperial) | 28 lb/in |
| Tensile Strength (Metric) | 49 N/100mm |
| Elongation at Break | 6% |
| Maximum Operating Temperature (Fahrenheit) | 300 ℉ |
| Maximum Operating Temperature (Celsius) | 149 ℃ |
| Minimum Operating Temperature (Fahrenheit) | -65 ℉ |
| Smallest Saleable Unit | Roll |
| Packaging | 1 Roll/Case |
| UPC | 00051125853873 |
| 3M ID | 7010379681 |
| Specifications Met | FAR 25.853(a), UL 746C, UL 723 Class L |
| Recommended Applications | Heat shielding, Heat reflecting, Chemical masking, 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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