Premium 24-inch aluminum foil tape with thermally conductive acrylic adhesive, ideal for heat shielding, chemical masking, and industrial applications from -65°F to 300°F with UL certification.
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. Featuring a dead soft aluminum foil backing with highly engineered pressure-sensitive acrylic adhesive, this tape delivers exceptional thermal conductivity and heat dissipation properties. The tape measures 24 inches in width and 180 yards in length with a total thickness of 4.6 mil, making it ideal for large-scale industrial applications requiring reliable performance.
This linered version of 3M™ Aluminum Foil Tape 425 is specifically engineered for heat shielding, heat reflecting, chemical masking, light enhancement, and de-paint operations. The thermally conductive aluminum backing effectively dissipates heat across the tape surface to reduce hot spots and protect substrates from high temperature effects. With a highly engineered acrylic adhesive system, the tape maintains a strong and reliable bond while withstanding exposure to high heat, humidity, moisture, weathering, UV rays, and various solvents. The tape can operate reliably from -65°F to 300°F (-54°C to 149°C), making it suitable for both indoor and outdoor applications.
The tape 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. Its dead soft aluminum foil backing conforms easily to curved and uneven surfaces, while the acrylic adhesive provides long-term durability and removes cleanly after harsh masking applications. With a backing thickness of 2.8 mil and adhesive thickness of 1.8 mil, this tape offers the perfect balance of flexibility and strength for demanding industrial applications.
Key Features
- Thermally conductive dead soft aluminum foil backing dissipates heat and reduces hot spots
- Highly engineered acrylic adhesive provides long-term durability and clean removal after masking
- Resistant to chemicals, moisture, weathering, UV exposure and various solvents
- UL Recognized to UL 746C and Classified UL 723 Class L for low flammability
- Conforms to curved and uneven surfaces for superior application versatility
- Heat and light reflective properties enhance thermal and lighting efficiency
- Operating temperature range from -65°F to 300°F (-54°C to 149°C)
- Meets FAR 25.853(a) specifications for aerospace applications
- Linered version suitable for die-cutting applications
- Ideal for seaming, sealing, splicing, and protective applications
Technical Specifications
| Specification |
Value |
| Brand | 3M™ |
| Product Number | 427 |
| Part Number | 427 |
| UPC | 00051125853798 |
| Backing Material | Aluminum Foil |
| Adhesive Type | Acrylic |
| Overall Width (Imperial) | 24 in |
| Overall Width (Metric) | 609.6 mm |
| Overall Length (Imperial) | 180 yd |
| Overall Length (Metric) | 164.59 m |
| Total Tape Thickness | 4.6 mil |
| Backing Thickness (Imperial) | 2.8 mil |
| Backing Thickness (Metric) | 0.07 mm |
| 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 |
| Tensile Strength (Imperial) | 28 lb/in |
| Tensile Strength (Metric) | 49 N/100mm |
| Elongation at Break | 6% |
| Product Color | Silver |
| Minimum Operating Temperature | -65°F (-54°C) |
| Maximum Operating Temperature | 300°F (149°C) |
| Smallest Saleable Unit | Roll |
| Quantity Per Case | 1 Roll/Case |
| UL Certification | UL Recognized to UL 746C, Classified UL 723 Class L |
| Specifications Met | FAR 25.853(a) |
| Industries | Aerospace, Appliance, Automotive, Construction, Electronics, General Industrial, Metalworking, Military, Specialty Vehicles, Transportation |
| Applications | Heat Shielding, Heat Reflecting, Chemical Masking, Light Enhancement, Chemical Milling, Seaming, Sealing, De-paint Operations, HVAC Duct Work, Refrigerator and Freezer Coil Attachment |
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