Premium aluminum foil tape with thermally conductive acrylic adhesive for heat shielding, chemical masking, and industrial sealing. Temperature range -65°F to 300°F. UL recognized for safety compliance.
3M™ Aluminum Foil Tape 425 LT80 is a premium industrial-grade foil tape engineered for demanding applications requiring superior heat dissipation and chemical resistance. Featuring a dead soft aluminum foil backing combined with a highly engineered acrylic adhesive, this tape delivers exceptional thermal conductivity and reliable performance across extreme temperature ranges from -65°F to 300°F (-54°C to 149°C). The thermally conductive design helps dissipate heat over the tape surface, reducing hot spots and protecting temperature-sensitive substrates from thermal damage.
This versatile foil tape is specifically formulated to withstand harsh industrial environments including exposure to moisture, weathering, UV radiation, and aggressive solvents while maintaining a strong, durable bond. The chemical-resistant acrylic adhesive ensures reliable performance during de-paint processes and other chemical masking operations, while the reflective aluminum surface enhances lighting efficiency and provides excellent heat reflection capabilities. With its 4.6 mil total thickness and 2.8 mil aluminum backing, this tape conforms easily to curved and uneven surfaces, making it ideal for complex industrial applications.
Recognized by UL to UL 746C and classified by UL to UL 723 Class "L" for low flammability rating, the 3M Aluminum Foil Tape 425 meets FAR 25.853(a) and L-T-80C specifications, ensuring compliance with aerospace and industrial safety standards. Each case contains 24 rolls of 60-yard length tape, providing substantial coverage for production environments. This tape is the industry standard choice for heat shielding, heat reflecting, chemical milling, seaming, sealing, and protective masking applications across aerospace, automotive, appliance, construction, electronics, and metalworking industries.
Key Features
- Thermally conductive aluminum foil backing dissipates heat and reduces hot spots on temperature-sensitive materials
- Highly engineered acrylic adhesive provides long-term durability and clean removal after harsh masking applications
- Chemical resistant formula protects surfaces during de-paint processes and chemical masking operations
- Withstands extreme temperatures from -65°F to 300°F with high heat and humidity resistance
- Dead soft aluminum foil conforms to curved and uneven surfaces for superior coverage
- Heat and light reflective surface enhances lighting efficiency and provides thermal protection
- UL recognized to UL 746C and classified UL 723 Class L for low flammability rating
- Meets FAR 25.853(a) and L-T-80C aerospace and industrial safety specifications
- Resistant to moisture, weathering, UV exposure, and aggressive solvents
- 24-month shelf life ensures product reliability and longevity in storage
Technical Specifications
| Specification |
Value |
| Product Name | 3M Aluminum Foil Tape 425 LT80 |
| Part Number | 425 |
| 3M Product Number | 425 |
| 3M ID | 7100229066 |
| UPC Code | 00638060407660 |
| Backing Material | Aluminum Foil (Dead Soft) |
| Backing Thickness (Imperial) | 2.8 mil |
| Backing Thickness (Metric) | 0.07 mm |
| Adhesive Thickness (Imperial) | 1.8 mil |
| Adhesive Thickness (Metric) | 0.05 mm |
| Total Tape Thickness (Imperial) | 4.6 mil |
| Adhesive Type | Acrylic - Pressure Sensitive |
| Overall Width (Imperial) | 1 inch |
| Overall Width (Metric) | 25.4 mm |
| Overall Length (Imperial) | 60 yards |
| Overall Length (Metric) | 54.864 meters |
| Tensile Strength (Imperial) | 28 lb/in |
| Tensile Strength (Metric) | 49 N/100mm |
| Elongation at Break | 6% |
| Number of Adhesive Sides | Single-sided |
| Product Color | Silver |
| Flame Retardant | Yes |
| Maximum Operating Temperature (Fahrenheit) | 300°F |
| Maximum Operating Temperature (Celsius) | 149°C |
| Minimum Operating Temperature (Fahrenheit) | -65°F |
| Minimum Operating Temperature (Celsius) | -54°C |
| Shelf Life | 24 months |
| Smallest Saleable Unit | Roll |
| Package Configuration | 24 Rolls per Case |
| Specifications Met | FAR 25.853(a), L-T-80C, SAE-AMS-T-23397 |
| UL Recognition | UL 746C (File E 122798) |
| UL Classification | UL 723 Class L for Low Flammability |
| Brand | 3M™ |
| Primary Applications | Heat Shielding, Heat Reflecting, Chemical Masking, Sealing, Seaming |
| Industries | Aerospace, Appliance, Automotive, Construction, Electronics, General Industrial, Metalworking, Military & Government, Specialty Vehicles, Transportation |
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