Premium aluminum foil tape with thermally conductive backing for heat shielding, chemical masking, and industrial sealing applications. Withstands temperatures up to 300°F with superior acrylic adhesive and flame retardant properties.
3M™ Aluminum Foil Tape 425 is a premium industrial-grade adhesive tape engineered for demanding applications across aerospace, automotive, appliance, construction, electronics, and general industrial sectors. This versatile foil tape features a dead soft aluminum foil backing combined with a highly engineered pressure-sensitive acrylic adhesive, making it ideal for heat shielding, heat reflecting, chemical masking, light enhancement, chemical milling, seaming, sealing, and de-paint operations. The tape's thermally conductive aluminum backing effectively dissipates heat to reduce hot spots and protect substrates from high temperature effects, while the superior acrylic adhesive maintains a strong, reliable bond even under extreme conditions.
The 3M Aluminum Foil Tape 425 is specifically designed to withstand exposure to high heat up to 300°F (149°C), humidity, moisture, weathering, UV radiation, and various solvents, ensuring excellent work life both indoors and outdoors. With a total thickness of 4.6 mil and dimensions of 1 inch wide by 60 yards long, this single-sided tape comes in cases of 48 rolls for bulk purchasing efficiency. The tape is UL Recognized to UL 746C (File E 122798) and classified by UL to UL 723 Class "L" for low flammability rating (File R 7311), meeting FAR 25.853(a) and L-T-80C specifications.
Recommended applications include heat shielding of delicate parts, heat reflecting, masking in chemical paint stripping, moisture barriers, light reflecting for light enhancement, chemical milling operations, seaming and sealing, refrigerator and freezer coil attachment, splicing of thin gauge foils, and plastic protection. The tape's 24-month shelf life and reliable performance make it the go-to solution for numerous industrial applications requiring thermal management, chemical resistance, and flame retardant properties.
Key Features
- Thermally conductive aluminum foil backing dissipates heat and improves heating/cooling efficiency
- Highly engineered acrylic adhesive provides long-term durability with clean removal after harsh masking applications
- Chemical resistant coating protects surfaces during de-paint processes and chemical masking operations
- Withstands extreme temperatures from -65°F to 300°F with flame retardant properties
- Dead soft aluminum foil conforms to curved and uneven surfaces for superior coverage
- UL Recognized to UL 746C and classified UL 723 Class L for low flammability rating
- Heat and light reflective properties enhance lighting efficiency and thermal management
- Resistant to moisture, weathering, UV radiation, and various solvents for indoor/outdoor use
- 24-month shelf life with reliable performance across aerospace, automotive, and industrial applications
- Single-sided adhesive construction ideal for seaming, sealing, and splicing operations
Technical Specifications
| Specification |
Value |
| Product Type | Aluminum Foil Tape |
| Brand | 3M™ |
| Model Number | 425 |
| Part Number | 425 |
| 3M Product Number | 425 |
| 3M ID | 7010292843 |
| UPC Code | 00051125855945 |
| Color | Silver |
| Overall Width (Imperial) | 1 inch |
| Overall Width (Metric) | 25.4 mm |
| Overall Length (Imperial) | 60 yards |
| Overall Length (Metric) | 54.86 meters |
| Total Tape Thickness | 4.6 mil |
| Backing (Carrier) Material | Aluminum Foil - Dead Soft |
| Backing Thickness (Imperial) | 2.8 mil |
| Backing Thickness (Metric) | 0.07 mm |
| Adhesive Type | Pressure-Sensitive Acrylic |
| Adhesive Thickness (Imperial) | 1.8 mil |
| Adhesive Thickness (Metric) | 0.05 mm |
| Number of Adhesive Sides | Single-sided |
| Tensile Strength (Imperial) | 28 lb/in |
| Tensile Strength (Metric) | 49 N/100mm |
| Elongation at Break | 6% |
| 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 |
| Smallest Saleable Unit | Roll |
| Quantity Per Case | 48 rolls |
| Shelf Life | 24 months |
| UL Recognition | UL 746C (File E 122798) |
| UL Classification | UL 723 Class L - 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 barriers, Light enhancement, Chemical milling, Seaming, Sealing, HVAC duct work, Refrigerator/Freezer coil attachment, Plastic protection |
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