Premium 18x60 yard aluminum foil tape with acrylic adhesive for heat shielding, thermal conductivity, and chemical masking in industrial applications
3M™ Aluminum Foil Tape 427 is a premium industrial-grade foil tape designed for demanding applications requiring thermal conductivity and chemical resistance. 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 dissipates heat over its surface to reduce hot spots and protect substrates from high temperature effects while maintaining a strong and reliable bond even in harsh environments.
With dimensions of 18 inches wide by 60 yards long and a total thickness of 4.6 mil, this tape is engineered to withstand exposure to high heat, humidity, moisture, weathering, UV radiation, and various solvents. The acrylic adhesive provides long-term durability while removing cleanly after harsh masking applications, making it versatile for both temporary and permanent installations. The tape is UL Recognized to UL 746C and Classified by UL to UL 723 Class "L" for low flammability rating, ensuring compliance with stringent safety standards.
Ideal for aerospace, appliance, automotive, construction, electronics, and general industrial applications, 3M™ Aluminum Foil Tape 427 excels in refrigerator and freezer coil attachment, splicing of thin gauge foils, and plastic protection. Its temperature use range spans from -65°F to 300°F (-54°C to 149°C), making it suitable for both extreme cold and high-heat environments. The silver color provides excellent light reflection for enhanced lighting efficiency while the thermally conductive backing ensures optimal heat dissipation in critical applications.
Key Features
- Thermally conductive aluminum foil backing dissipates heat and improves HVAC efficiency
- Highly engineered acrylic adhesive provides long-term durability and clean removal after masking
- Resistant to chemicals, moisture, weathering, UV exposure and extreme temperatures
- UL Recognized to UL 746C and Classified by UL 723 Class L for low flammability
- Dead soft aluminum conforms to curved and uneven surfaces for superior sealing
- Heat and light reflective properties enhance lighting efficiency and protect surfaces
- Temperature range from -65°F to 300°F suitable for extreme environments
- Linered version ideal for die cutting and precision applications
- Excellent for heat shielding, seaming, sealing, and de-paint operations
- Multiple industry certifications including FAR 25.853(a) compliance
Technical Specifications
| Specification |
Value |
| Product Number | 427 |
| Brand | 3M™ |
| Product Color | Silver |
| Overall Width (Imperial) | 18 inches |
| Overall Width (Metric) | 457.2 millimeters |
| Overall Length (Imperial) | 60 yards |
| Overall Length (Metric) | 54.86 meters |
| Total Tape Thickness without Liner (Imperial) | 4.6 mil |
| Backing (Carrier) Thickness (Imperial) | 2.8 mil |
| Backing (Carrier) Thickness (Metric) | 0.07 millimeters |
| Backing (Carrier) Material | Aluminum Foil |
| Adhesive Type | Acrylic |
| Back Side Adhesive Thickness (Imperial) | 1.8 mil |
| Back Side Adhesive Thickness (Metric) | 0.05 millimeters |
| Primary Liner | Easy Release Film |
| Primary Liner Thickness (Imperial) | 3.1 mil |
| Primary Liner Thickness (Metric) | 0.08 millimeters |
| Tensile Strength (Imperial) | 28 pounds per inch |
| Tensile Strength (Metric) | 49 Newtons per 100 millimeters |
| Elongation at Break | 6 percent |
| 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 |
| Packaging | 1 Roll per Case |
| UPC Code | 00051125855310 |
| 3M ID | 7010337247 |
| Specifications Met | FAR 25.853(a), UL 746C, UL 723 Class L |
| Applications | Heat shielding, heat reflecting, chemical masking, light enhancement, chemical milling, seaming, sealing, de-paint operations, HVAC duct sealing, refrigerator and freezer coil attachment, plastic protection |
| Industries | Aerospace, Appliance, Automotive, Construction, Electronics, General Industrial, Metalworking, Military, Specialty Vehicles, Transportation |
| Use Type | Industrial/Occupational Use Only |
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