Premium aluminum foil tape with acrylic adhesive for heat shielding, thermal protection, and chemical masking in industrial applications. Temperature range -65°F to 300°F with UL certification.
3M™ Aluminum Foil Tape 427 is a premium industrial-grade foil tape engineered for demanding applications requiring exceptional heat dissipation and thermal protection. 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 that provides long-term durability while maintaining the ability to remove cleanly after harsh masking applications. The tape is specifically designed to dissipate heat over its surface, reducing hot spots and protecting substrates from high-temperature effects, making it ideal for heat shielding of delicate parts and components.
The 427 tape withstands exposure to high heat and humidity while maintaining a strong, reliable bond across a wide range of challenging environments. With a temperature use range from -65°F to 300°F (-54°C to 149°C), this tape is suitable for both indoor and outdoor applications. It resists chemicals, moisture, weathering, and UV exposure, providing excellent work life in harsh conditions. The tape's thermal conductivity properties enhance heating and cooling efficiency, protecting temperature-sensitive materials from damage. Its dead soft aluminum foil backing conforms easily to curved and uneven surfaces, enabling versatile application on complex geometries.
This product 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) specifications. The 427 tape is ideal for heat reflecting, chemical masking in paint stripping applications, light enhancement, chemical milling, seaming, sealing, refrigerator and freezer coil attachment, splicing of thin gauge foils, and plastic protection. Available in a convenient 30-inch by 60-yard roll format with 4.6 mil total thickness, this industrial-use-only product is perfect for aerospace, appliance, automotive, construction, electronics, and general industrial applications.
Key Features
- Thermally conductive aluminum foil backing dissipates heat and reduces hot spots for superior thermal protection
- Highly engineered acrylic adhesive provides long-term durability with clean removal after harsh masking applications
- Resistant to chemicals, moisture, weathering, and UV exposure for excellent outdoor and indoor performance
- Dead soft aluminum backing conforms to curved and uneven surfaces for versatile application on complex geometries
- UL recognized to UL 746C and classified to UL 723 Class L for low flammability with FAR 25.853(a) compliance
- Linered version suitable for die-cutting and precision applications
- Heat and light reflective properties enhance lighting efficiency and protect surfaces
- Temperature range -65°F to 300°F ideal for aerospace, automotive, appliance, and electronics industries
Technical Specifications
| Specification |
Value |
| Product Name | 3M™ Aluminum Foil Tape 427, LT80 |
| Part Number | 427 |
| 3M Product Number | 427 |
| 3M ID | 7010290687 |
| UPC Code | 00051128998717 |
| Backing Material | Dead Soft Aluminum Foil |
| Adhesive Type | Acrylic, Pressure-Sensitive |
| Color | Silver |
| Overall Width (Imperial) | 30 inches |
| Overall Width (Metric) | 762 mm |
| Overall Length (Imperial) | 60 yards |
| Overall Length (Metric) | 54.86 meters |
| Backing Thickness (Imperial) | 2.8 mil |
| Backing Thickness (Metric) | 0.07 mm |
| Adhesive Thickness (Imperial) | 1.8 mil |
| Adhesive Thickness (Metric) | 0.05 mm |
| Total Tape Thickness (Imperial) | 4.6 mil |
| Primary Liner | Easy Release Film |
| Primary Liner Thickness (Imperial) | 3.1 mil |
| Primary Liner Thickness (Metric) | 0.08 mm |
| Tensile Strength (Imperial) | 28 lb/in |
| Tensile Strength (Metric) | 49 N/100mm |
| Elongation at Break | 6% |
| Minimum Operating Temperature | -65°F (-54°C) |
| Maximum Operating Temperature | 300°F (149°C) |
| Temperature Range | -65°F to 300°F (-54°C to 149°C) |
| UL Recognition | UL 746C (File E 122798) |
| UL Classification | UL 723 Class L for Low Flammability (File R 7311) |
| Specifications Met | FAR 25.853(a) |
| Smallest Saleable Unit | Roll |
| Quantity per Case | 1 Roll/Case |
| Industries | Aerospace, Appliance, Automotive, Construction, Electronics, General Industrial, Metalworking, Military, Military & Government, Specialty Vehicles, Transportation |
| Applications | Exterior Seams & Joints, Heat Shielding, Interior Seams & Joints, Painting & Depainting, Refrigerator and Freezer Coil Attachment, Sealing HVAC & Duct Work, Sealing Plate Edges Against Solvent Penetration, Shielding, Shielding From Engine Heat, Wiring Harness Attachment |
| Brand | 3M™ |
| Product Type | Industrial Foil Tape |
| Liner Type | Linered Version |
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