Premium 3M aluminum foil tape with thermally conductive backing, acrylic adhesive, and superior chemical resistance for heat shielding, masking, and industrial sealing applications. 24 inch width, 60 yard length, UL certified.
3M™ Aluminum Foil Tape 427 is a premium industrial-grade foil tape engineered for demanding applications requiring superior heat dissipation and chemical resistance. Featuring a dead soft aluminum foil backing with highly engineered acrylic adhesive, this linered version of the 3M™ Aluminum Foil Tape 425 is ideal for heat shielding, heat reflecting, chemical masking, light enhancement, chemical milling, seaming, sealing and de-paint operations. The tape's thermally conductive properties help dissipate heat over the surface to reduce hot spots and protect substrates from high temperature effects.
With exceptional durability and reliability, 3M™ Aluminum Foil Tape 427 withstands exposure to high heat, humidity, moisture, weathering, UV rays and solvents while maintaining a strong bond. The pressure-sensitive acrylic adhesive provides long-term durability yet removes cleanly after harsh masking applications, making it perfect for temporary applications. The tape is heat and light reflective, enhancing lighting efficiency while protecting surfaces. Its dead soft aluminum foil backing conforms easily to curved and uneven surfaces, providing excellent coverage and adhesion.
This versatile tape is recognized by UL to UL 746C and classified by UL to UL 723, Class "L" for low flammability rating, meeting FAR 25.853(a) standards. Operating temperature range from -65°F to 300°F (-54°C to 149°C) makes it suitable for extreme environmental conditions. Each roll measures 24 inches wide by 60 yards long with a total thickness of 4.6 mil, providing substantial coverage for industrial applications across aerospace, automotive, appliance, construction, electronics and military sectors.
Key Features
- Thermally conductive aluminum foil backing dissipates heat and improves heating and cooling efficiency
- Highly engineered acrylic adhesive provides long-term durability and removes cleanly after harsh masking applications
- Resistant to chemicals, moisture, weathering, UV rays and solvents for extended work life
- Dead soft aluminum backing conforms to curved and uneven surfaces for optimal coverage
- UL recognized to UL 746C and classified to UL 723 Class L for low flammability rating
- Heat and light reflective properties protect surfaces and enhance lighting efficiency
- Linered version suitable for die-cutting applications
- Wide operating temperature range from -65°F to 300°F (-54°C to 149°C)
- Ideal for aerospace, automotive, appliance, construction, electronics and military applications
- Meets FAR 25.853(a) specifications for aviation compliance
Technical Specifications
| Specification |
Value |
| Product Name | 3M™ Aluminum Foil Tape 427 |
| Part Number | 427 |
| UPC Code | 00051125854351 |
| Product Color | Silver |
| Backing Material | Dead Soft Aluminum Foil |
| Backing Thickness (Imperial) | 2.8 mil |
| Backing Thickness (Metric) | 0.07 mm |
| Adhesive Type | Acrylic, Pressure-Sensitive |
| Adhesive Thickness (Imperial) | 1.8 mil |
| Adhesive Thickness (Metric) | 0.05 mm |
| Total Tape Thickness (Imperial) | 4.6 mil |
| Overall Width (Imperial) | 24 in |
| Overall Width (Metric) | 609.6 mm |
| Overall Length (Imperial) | 60 yd |
| Overall Length (Metric) | 54.86 m |
| Tensile Strength (Imperial) | 28 lb/in |
| Tensile Strength (Metric) | 49 N/100mm |
| Elongation at Break | 6% |
| Primary Liner Material | Easy Release Film |
| Primary Liner Thickness (Imperial) | 3.1 mil |
| Primary Liner Thickness (Metric) | 0.08 mm |
| Minimum Operating Temperature (Fahrenheit) | -65°F |
| Minimum Operating Temperature (Celsius) | -54°C |
| Maximum Operating Temperature (Fahrenheit) | 300°F |
| Maximum Operating Temperature (Celsius) | 149°C |
| Smallest Saleable Unit | Roll |
| Package Configuration | 1 Roll/Case |
| UL Recognition | UL 746C (File E 122798) |
| UL Classification | UL 723 Class L - Low Flammability Rating (File R 7311) |
| Specifications Met | FAR 25.853(a) |
| Brand | 3M™ |
| Product Type | Aluminum Foil Tape with Liner |
| Industries Served | Aerospace, Appliance, Automotive, Construction, Electronics, General Industrial, Metalworking, Military, Military & Government, Specialty Vehicles, Transportation |
| 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 |
| Use Type | Industrial/Occupational Use Only |
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