Premium thermally conductive aluminum foil tape with acrylic adhesive for industrial heat shielding, masking, and sealing applications. UL certified, temperature range -65°F to 300°F, includes 8 rolls per case.
3M™ Aluminum Foil Tape 427 is a premium industrial-grade thermally conductive foil tape designed for demanding applications across aerospace, automotive, appliance, and construction industries. Featuring a dead soft aluminum foil backing with a highly engineered pressure-sensitive acrylic adhesive, this linered version of the 3M™ Aluminum Foil Tape 425 offers exceptional performance in heat shielding, heat reflecting, chemical masking, and light enhancement applications. The tape dissipates heat over its surface to reduce hot spots and protect substrates from high temperature effects while maintaining a strong, reliable bond even under harsh conditions.
With outstanding resistance to chemicals, moisture, weathering, and UV exposure, 3M™ Aluminum Foil Tape 427 provides excellent durability for both indoor and outdoor applications. The tape withstands temperature ranges from -65°F to 300°F (-54°C to 149°C) and meets rigorous UL standards including UL 746C recognition and UL 723 classification for low flammability rating. Its unique dead soft aluminum backing conforms easily to curved and uneven surfaces, making it ideal for complex die-cutting applications and irregular substrate geometries.
This versatile foil tape is the industry go-to solution for refrigerator and freezer coil attachment, splicing of thin gauge foils, plastic protection, seaming and sealing operations, and numerous masking applications in chemical paint stripping processes. The tape's ability to remove cleanly after harsh masking applications, combined with its superior thermal conductivity and light reflectivity, makes it an indispensable tool for professionals requiring reliable performance in critical industrial applications.
Key Features
- Thermally conductive dead soft aluminum foil backing dissipates heat and reduces hot spots
- Highly engineered acrylic pressure-sensitive adhesive provides long-term durability and clean removal
- Resistant to chemicals, moisture, weathering, and UV exposure for indoor and outdoor use
- UL recognized to UL 746C and classified to UL 723 Class L for low flammability rating
- Conforms to curved and uneven surfaces with superior heat and light reflectivity
- Temperature range from -65°F to 300°F (-54°C to 149°C) for demanding applications
- Linered version suitable for die-cutting and complex industrial applications
- Meets FAR 25.853(a) specification for aerospace and transportation industries
Technical Specifications
| Specification |
Value |
| Brand | 3M™ |
| Product Number | 427 |
| UPC Code | 00051125853446 |
| 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 |
| Overall Width (Imperial) | 5.9 in |
| Overall Width (Metric) | 150 mm |
| Overall Length (Imperial) | 60.14 yd |
| Overall Length (Metric) | 55 m |
| 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) |
| Product Color | Silver |
| Units per Case | 8 rolls |
| 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) |
| Industries Served | Aerospace, Appliance, Automotive, Construction, Electronics, General Industrial, Metalworking, Military, Specialty Vehicles, Transportation |
| Recommended Applications | Heat shielding, Heat reflecting, Chemical masking, Moisture barrier, Light reflecting, Chemical milling, Seaming and sealing, Refrigerator and freezer coil attachment, Splicing, Plastic protection |
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