Premium 3-inch x 60-yard aluminum foil tape with acrylic adhesive for heat shielding, chemical masking, and industrial sealing. UL certified, flame retardant, temperature range -65°F to 300°F. 12 rolls per case.
3M™ Aluminum Foil Tape 425 is a premium industrial-grade foil tape designed for demanding applications across aerospace, automotive, appliance, and construction industries. Featuring a dead soft aluminum foil backing combined with a highly engineered pressure-sensitive acrylic adhesive, this tape delivers exceptional thermal conductivity and chemical resistance. The tape dissipates heat effectively to reduce hot spots and protect substrates from high-temperature effects, making it ideal for heat shielding applications. With a maximum operating temperature of 300°F (149°C) and minimum of -65°F (-54°C), it maintains a strong, reliable bond across extreme temperature ranges. The 3-inch width and 60-yard length per roll provide ample coverage for various sealing, masking, and protective applications.
This versatile tape excels in heat reflecting, chemical masking, light enhancement, chemical milling, seaming, and sealing operations. The acrylic adhesive formulation provides long-term durability while removing cleanly after harsh masking applications, making it perfect for de-paint processes and other demanding industrial operations. The tape withstands exposure to flame, weathering, moisture, and UV radiation, ensuring reliable performance both indoors and outdoors. With a backing thickness of 2.8 mil (0.07 mm) and total tape thickness of 4.6 mil, it offers optimal balance between conformability and durability.
Recognized by UL to UL 746C and classified by UL to UL 723 Class "L" for low flammability rating, this tape meets stringent safety standards including FAR 25.853(a) and L-T-80C specifications. The single-sided adhesive design with 1.8 mil adhesive thickness ensures consistent application and reliable adhesion. Each case contains 12 rolls, providing comprehensive coverage for large-scale industrial projects. The 24-month shelf life ensures long-term storage capability without performance degradation.
Key Features
- Thermally conductive aluminum foil backing dissipates heat and protects temperature-sensitive materials
- Chemical resistant formulation ideal for de-paint processes and harsh masking operations
- Highly engineered acrylic adhesive provides long-term durability with clean removal
- Dead soft aluminum foil conforms to curved and uneven surfaces for seamless application
- UL certified for low flammability (UL 723 Class L) and meets FAR 25.853(a) specifications
Technical Specifications
| Specification |
Value |
| Product Type | Aluminum Foil Tape |
| Brand | 3M™ |
| Part Number | 425 |
| UPC | 00051125853125 |
| Width (Imperial) | 3 in |
| Width (Metric) | 7.6 cm |
| Length (Imperial) | 60 yd |
| 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 |
| Backing Material | Dead Soft Aluminum Foil |
| Adhesive Type | Acrylic |
| Color | Silver |
| Number of Adhesive Sides | Single-sided |
| Maximum Operating Temperature (Fahrenheit) | 300°F |
| Maximum Operating Temperature (Celsius) | 149°C |
| Minimum Operating Temperature (Fahrenheit) | -65°F |
| Minimum Operating Temperature (Celsius) | -54°C |
| Tensile Strength (Imperial) | 28 lb/in |
| Tensile Strength (Metric) | 49 N/100mm |
| Elongation at Break | 6% |
| Flame Retardant | Yes |
| UL Certification | UL 746C (File E 122798) and UL 723 Class L |
| Specifications Met | FAR 25.853(a), L-T-80C, SAE-AMS-T-23397 |
| Shelf Life | 24 Months |
| Smallest Saleable Unit | Roll |
| Rolls Per Case | 12 |
| Industries | 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 |
| Weather Resistance | Withstands flame, weathering, moisture, and UV exposure |
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