Professional-grade aluminum foil tape with thermally conductive acrylic adhesive for heat shielding, chemical masking, and sealing applications. Temperature rated -65°F to 300°F with UL certification and clean removal properties.
3M™ Aluminum Foil Tape 425 is a professional-grade industrial adhesive tape designed for demanding applications across aerospace, automotive, construction, and electronics industries. Featuring a dead soft aluminum foil backing combined with a highly engineered pressure-sensitive acrylic adhesive, this versatile tape delivers exceptional performance in heat shielding, heat reflecting, chemical masking, and sealing applications. The tape's thermally conductive aluminum foil backing effectively dissipates heat over its surface to reduce hot spots and protect substrates from high temperature effects, while maintaining a strong and reliable bond even under extreme conditions.
With a temperature operating range from -65°F to 300°F (-54°C to 149°C), this tape withstands exposure to high heat, humidity, moisture, weathering, UV radiation, and various solvents, ensuring excellent work life both indoors and outdoors. The 0.5-inch width and 60-yard length configuration provides ample coverage for seaming, sealing, refrigerator and freezer coil attachment, plastic protection, and light enhancement applications. The tape's chemical resistance makes it ideal for de-paint processes and other chemical masking operations, while its dead soft aluminum foil backing conforms perfectly to curved and uneven surfaces without tearing or wrinkling.
UL Recognized to UL 746C (File E 122798) and Classified by UL to UL 723 "L" for low flammability rating (File R 7311), this tape meets stringent safety standards including L-T-80C certification and FAR 25.853(a) specifications. Each case contains 72 rolls, making it economical for high-volume industrial operations. The tape's superior adhesive formulation removes cleanly after harsh masking applications, preventing residue buildup and surface damage, while the 24-month shelf life ensures product reliability and performance consistency.
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
- Chemical resistant for de-paint operations and harsh masking applications
- Temperature rated from -65°F to 300°F with humidity and UV resistance
- UL Recognized and Classified for low flammability with FAR 25.853(a) compliance
- Conforms to curved and uneven surfaces without tearing
- Heat and light reflective properties enhance efficiency and protect surfaces
- Withstands moisture, weathering, and solvent exposure
- 24-month shelf life ensures product reliability
- 72 rolls per case for high-volume industrial operations
Technical Specifications
| Specification |
Value |
| Product Name | 3M™ Aluminum Foil Tape 425 |
| Part Number | 425 |
| UPC | 00051125853576 |
| 3M ID | 7100053645 |
| Color | Silver |
| Backing Material | Aluminum Foil (Dead Soft) |
| Adhesive Type | Acrylic (Pressure-Sensitive) |
| Overall Width (Imperial) | 0.5 in |
| Overall Width (Metric) | 1.3 cm |
| Overall Length (Imperial) | 60 yd |
| Overall Length (Metric) | 54.9 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 |
| 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 |
| Number of Adhesive Sides | Single-Sided |
| Shelf Life | 24 Months |
| Smallest Saleable Unit | Roll |
| Rolls Per Case | 72 |
| 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 |
| Brand | 3M™ |
| 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 reflecting, Chemical milling, Seaming and sealing, Refrigerator and freezer coil attachment, Splicing, Plastic protection |
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