Premium 48in x 60yd aluminum foil tape with thermally conductive acrylic adhesive for heat shielding, chemical masking, and HVAC applications. UL rated for low flammability with temperature range -65°F to 300°F.
3M™ Aluminum Foil Tape 427 is a premium industrial-grade foil tape designed for demanding applications requiring heat dissipation, chemical resistance, and superior adhesive performance. 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, and de-paint operations. The tape measures 48 inches wide by 60 yards long with a total thickness of 4.6 mil, providing excellent coverage for large-scale industrial applications.
This thermally conductive tape excels at dissipating heat over its surface to reduce hot spots and protect sensitive substrates from high-temperature effects. It withstands exposure to flame, weathering, moisture, and UV radiation, making it suitable for both indoor and outdoor applications. The tape's dead soft aluminum foil backing conforms seamlessly to curved and uneven surfaces, while the pressure-sensitive acrylic adhesive provides long-term durability and removes cleanly after harsh masking applications. With a temperature use range from -65°F to 300°F (-54°C to 149°C), it performs reliably in extreme conditions.
UL Recognized to UL 746C and Classified by UL to UL 723 Class "L" for low flammability rating, this tape meets FAR 25.853(a) specifications. Its versatile applications include refrigerator and freezer coil attachment, seaming and sealing of thin gauge foils, plastic protection, moisture barriers, HVAC duct work sealing, and wiring harness attachment. The single roll per case packaging ensures convenient storage and handling for industrial and occupational use.
Key Features
- Thermally conductive aluminum foil backing dissipates heat and improves heating/cooling efficiency
- Highly engineered acrylic adhesive provides long-term durability with clean removal after masking
- Resistant to flame, weathering, moisture, UV exposure, and harsh chemicals
- Dead soft aluminum foil conforms to curved and uneven surfaces for seamless application
- UL Recognized to UL 746C and Classified by UL 723 Class L for low flammability rating
- Temperature range from -65°F to 300°F (-54°C to 149°C) for extreme condition performance
- Linered version suitable for die-cutting applications and precision requirements
- Heat and light reflective properties enhance lighting efficiency and surface protection
Technical Specifications
| Specification |
Value |
| Brand | 3M™ |
| Product Number | 427 |
| UPC Code | 00051128998472 |
| Overall Width (Imperial) | 48 in |
| Overall Width (Metric) | 1,219.2 mm |
| Overall Length (Imperial) | 60 yd |
| Overall Length (Metric) | 54.86 m |
| Total Tape Thickness | 4.6 mil |
| Backing Material | Aluminum Foil (Dead Soft) |
| 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 |
| Primary Liner | Easy Release Film |
| Liner Thickness (Imperial) | 3.1 mil |
| Liner Thickness (Metric) | 0.08 mm |
| Product Color | Silver |
| Tensile Strength (Imperial) | 28 lb/in |
| Tensile Strength (Metric) | 49 N/100mm |
| Elongation at Break | 6% |
| Maximum Operating Temperature (Fahrenheit) | 300°F |
| Maximum Operating Temperature (Celsius) | 149°C |
| Minimum Operating Temperature (Fahrenheit) | -65°F |
| Minimum Operating Temperature (Celsius) | -54°C |
| UL Recognition | UL 746C (File E 122798) |
| UL Classification | UL 723 Class L (Low Flammability) |
| Specifications Met | FAR 25.853(a) |
| Packaging | 1 Roll/Case |
| Smallest Saleable Unit | Roll |
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