Premium aluminum foil tape with thermally conductive backing and acrylic adhesive for heat shielding, chemical masking, and industrial sealing applications. Temperature range -65°F to 300°F. UL recognized for low flammability.
3M™ Aluminum Foil Tape 425 is a premium industrial-grade foil tape engineered for demanding applications across aerospace, automotive, appliance, construction, electronics, and manufacturing industries. This versatile tape features a dead soft aluminum foil backing that conforms easily to curved and uneven surfaces, combined with a highly engineered pressure-sensitive acrylic adhesive that provides exceptional durability and clean removal after harsh masking applications. The thermally conductive aluminum backing effectively dissipates heat to reduce hot spots and protect substrates from high temperature effects, while maintaining a strong, reliable bond even in extreme conditions.
The tape is specifically designed for heat shielding, heat reflecting, chemical masking, light enhancement, chemical milling, seaming, sealing, and de-paint operations. It withstands continuous exposure to high temperatures up to 300°F (149°C) and low temperatures down to -65°F (-54°C), making it suitable for both indoor and outdoor applications. The acrylic adhesive is resistant to chemicals, moisture, weathering, and UV exposure, ensuring excellent performance during de-paint processes and other chemical masking operations. With a shelf life of 24 months, this single-sided tape delivers consistent performance across refrigeration, aerospace, automotive, and general industrial applications.
This product meets stringent industry standards including UL 746C recognition and UL 723 classification for low flammability (Class L). It also complies with FAR 25.853(a) and L-T-80C specifications, making it ideal for aerospace and military applications. The 3/4 inch width and 60-yard length per roll, offered in cases of 48 rolls, provide excellent value for high-volume industrial users requiring reliable, professional-grade adhesive solutions.
Key Features
- Thermally conductive aluminum foil backing dissipates heat and protects temperature-sensitive materials
- Highly engineered acrylic adhesive provides long-term durability with clean removal after harsh applications
- Chemical resistant for de-paint processes and industrial chemical masking operations
- Dead soft aluminum foil conforms to curved and uneven surfaces for superior coverage
- Withstands extreme temperatures from -65°F to 300°F with excellent moisture and UV resistance
Technical Specifications
| Specification |
Value |
| Brand | 3M™ |
| Part Number | 425 |
| UPC Code | 00051125853095 |
| Product Color | Silver |
| 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 |
| Total Tape Thickness | 4.6 mil |
| Width (Imperial) | 0.75 inches |
| Width (Metric) | 1.9 cm |
| Length (Imperial) | 60 yards |
| Length (Metric) | 54.9 meters |
| Tensile Strength (Imperial) | 28 lb/in |
| Tensile Strength (Metric) | 49 N/100mm |
| Elongation at Break | 6% |
| Number of Adhesive Sides | Single-sided |
| Smallest Saleable Unit | Roll |
| Case Quantity | 48 rolls per case |
| Maximum Operating Temperature (Fahrenheit) | 300°F |
| Maximum Operating Temperature (Celsius) | 149°C |
| Minimum Operating Temperature (Fahrenheit) | -65°F |
| Minimum Operating Temperature (Celsius) | -54°C |
| Flame Retardant | Yes |
| Shelf Life | 24 months |
| UL Recognition | UL 746C (File E 122798) |
| UL Classification | UL 723, Class L for low flammability |
| Specifications Met | FAR 25.853(a), L-T-80C, SAE-AMS-T-23397 |
| Industries Served | Aerospace, Appliance, Automotive, Construction, Electronics, General Industrial, Metalworking, Military & Government, Specialty Vehicles, Transportation |
| Recommended Applications | Heat shielding, heat reflecting, chemical masking, moisture barrier, light enhancement, chemical milling, seaming, sealing, refrigerator and freezer coil attachment, splicing, plastic protection |
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