Industrial-grade aluminum foil tape with thermally conductive acrylic adhesive, heat resistant to 300°F, ideal for heat shielding, masking, and sealing applications across aerospace, automotive, and electronics industries.
3M™ Aluminum Foil Tape 425 is a premium industrial-grade foil 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 tape delivers exceptional thermal conductivity and heat dissipation properties. The tape is capable of withstanding extreme temperatures ranging from -65°F to 300°F (-54°C to 149°C), making it ideal for heat shielding, heat reflecting, and thermal management applications.
This versatile tape offers superior chemical resistance and maintains strong adhesion even after exposure to harsh masking operations, de-paint processes, and chemical stripping applications. With a 4.6 mil total thickness and 2.8 mil backing, the tape provides optimal balance between flexibility and durability. The dead soft aluminum foil backing conforms easily to curved and uneven surfaces, while the acrylic adhesive ensures long-term durability without leaving residue when removed. The tape is UL Recognized to UL 746C and Classified by UL to UL 723 Class L for low flammability rating, meeting F.A.R 25.853(a) and L-T-80C specifications.
Available in a convenient 36 roll case format with each roll measuring 1 inch wide by 60 yards long, this tape is perfect for high-volume industrial operations. The product is recognized for its heat and light reflective properties, making it an excellent choice for enhancing lighting efficiency and protecting temperature-sensitive materials. Whether used for refrigerator and freezer coil attachment, splicing thin gauge foils, HVAC sealing, or wiring harness attachment, 3M Aluminum Foil Tape 425 delivers reliable performance in the most challenging industrial environments.
Key Features
- Thermally conductive aluminum foil backing dissipates heat and reduces hot spots for temperature-sensitive material protection
- Dead soft aluminum foil conforms to curved and uneven surfaces for superior coverage and conformability
- Highly engineered acrylic adhesive provides long-term durability with clean removal after harsh masking applications
- Withstands extreme temperatures from -65°F to 300°F (-54°C to 149°C) and resists chemicals, moisture, weathering, and UV exposure
- UL Recognized to UL 746C and Classified by UL to UL 723 Class L for low flammability rating with F.A.R 25.853(a) compliance
Technical Specifications
| Specification |
Value |
| Product Number | 425 |
| Brand | 3M™ |
| Color | Silver |
| Overall Width (Imperial) | 1 in |
| Overall Width (Metric) | 2.5 cm |
| Overall Length (Imperial) | 60 yd |
| Overall Length (Metric) | 54.86 m |
| Total Tape Thickness | 4.6 mil |
| Backing (Carrier) Thickness (Imperial) | 2.8 mil |
| Backing (Carrier) Thickness (Metric) | 0.07 mm |
| Adhesive Thickness (Imperial) | 1.8 mil |
| Adhesive Thickness (Metric) | 0.05 mm |
| Backing Material | Aluminum Foil (Dead Soft) |
| Adhesive Type | Acrylic, Pressure-Sensitive |
| 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 |
| Quantity per Case | 36 Rolls |
| UPC | 00051125853880 |
| 3M ID | 7100053741 |
| Specifications Met | FAR 25.853(a), L-T-80C, SAE-AMS-T-23397, UL 746C, UL 723 Class L |
| Recommended Applications | Heat shielding, heat reflecting, masking, moisture barrier, light reflecting, chemical milling, seaming, sealing, refrigerator and freezer coil attachment, splicing, plastic protection |
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