Premium thermally conductive aluminum foil tape with acrylic adhesive for heat shielding, masking, and sealing applications. UL-recognized for low flammability with temperature range -65°F to 300°F.
3M™ Aluminum Foil Tape 427 is a premium industrial-grade foil tape engineered for demanding applications across aerospace, automotive, construction, and electronics industries. Featuring a dead soft aluminum foil backing with highly engineered acrylic adhesive, this linered version of the 3M™ Aluminum Foil Tape 425 is specifically designed for die cutting applications and heat-sensitive operations. The tape's thermally conductive properties help dissipate heat and improve heating and cooling efficiency, making it ideal for protecting temperature-sensitive materials from thermal damage.
This versatile tape excels in heat shielding, heat reflecting, chemical masking, light enhancement, chemical milling, seaming, sealing, and de-paint operations. The acrylic adhesive provides long-term durability while removing cleanly after harsh masking applications, making it perfect for temporary protection during manufacturing processes. With its exceptional chemical resistance, the tape protects surfaces during de-paint processes and other chemical masking operations, withstanding exposure to flame, weathering, moisture, and UV radiation for reliable performance both indoors and outdoors.
Each case contains 2 rolls of 180-yard tape with a 6-inch width and 4.6 mil total thickness. The tape is UL Recognized to UL 746C (File E 122798) and Classified by UL to UL 723 'L' for low flammability rating (File R 7311), meeting FAR 25.853(a) specifications. Operating temperature range spans from -65°F to 300°F (-54°C to 149°C), ensuring reliable performance across extreme environmental conditions.
Key Features
- Thermally conductive aluminum foil backing dissipates heat and improves HVAC efficiency
- Highly engineered acrylic adhesive provides long-term durability and clean removal
- Chemical resistant for de-paint operations and masking applications
- UL Recognized to UL 746C with Class L low flammability rating
- Withstands extreme temperatures from -65°F to 300°F and resists UV, moisture, and weathering
- Dead soft aluminum foil conforms to curved and uneven surfaces
- Linered design suitable for die cutting and precision applications
- Ideal for heat shielding, light reflection, and seaming operations
Technical Specifications
| Specification |
Value |
| Product Number | 427 |
| UPC Code | 00051125853866 |
| Backing Material | Aluminum Foil (Dead Soft) |
| Adhesive Type | Acrylic (Pressure Sensitive) |
| Product Color | Silver |
| Overall Width | 6 inches (152.4 mm) |
| Overall Length | 180 yards (164.59 meters) |
| Total Tape Thickness | 4.6 mil (without liner) |
| Backing Thickness | 2.8 mil (0.07 mm) |
| Adhesive Thickness | 1.8 mil (0.05 mm) |
| Primary Liner | Easy Release Film |
| Primary Liner Thickness | 3.1 mil (0.08 mm) |
| Tensile Strength | 28 lb/in (49 N/100mm) |
| Elongation at Break | 6% |
| Minimum Operating Temperature | -65°F (-54°C) |
| Maximum Operating Temperature | 300°F (149°C) |
| Package Configuration | 2 Rolls per Case |
| Smallest Saleable Unit | Roll |
| UL Recognition | UL 746C (File E 122798) |
| UL Classification | UL 723 Class L - Low Flammability |
| Specifications Met | FAR 25.853(a) |
| Brand | 3M™ |
| Recommended Applications | Heat shielding, heat reflecting, chemical masking, light enhancement, chemical milling, seaming, sealing, refrigerator and freezer coil attachment, splicing, plastic protection |
| Industries | Aerospace, Appliance, Automotive, Construction, Electronics, General Industrial, Metalworking, Military, Specialty Vehicles, Transportation |
| Chemical Resistance | Resistant to solvents, moisture, weathering, and UV exposure |
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