Premium industrial aluminum foil tape with thermally conductive acrylic adhesive, ideal for heat shielding, chemical masking, and high-temperature sealing applications up to 300°F.
3M™ Aluminum Foil Tape 425 is a premium industrial-grade thermal and chemical-resistant adhesive 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 performance in heat shielding, heat reflection, chemical masking, and sealing operations. The tape maintains a strong and reliable bond while withstanding exposure to extreme temperatures ranging from -65°F to 300°F (-54°C to 149°C), making it ideal for protecting temperature-sensitive materials and components.
This versatile aluminum foil tape excels in moisture barrier applications, light enhancement, chemical milling, seaming, and de-paint operations. The thermally conductive backing effectively dissipates heat over the tape surface to reduce hot spots and protect substrates from high-temperature effects. With superior chemical resistance, the tape protects surfaces during de-paint processes and other chemical masking operations. The highly engineered acrylic adhesive provides long-term durability while removing cleanly after harsh masking applications, ensuring minimal residue and damage to underlying surfaces.
UL Recognized to UL 746C and Classified by UL to UL 723 with a Class "L" low flammability rating, this tape meets FAR 25.853(a) and L-T-80C specifications. Each case contains 2 rolls of 60-yard length with 6-inch width, featuring a 4.6-mil total thickness and 2.8-mil backing thickness. The dead soft aluminum foil backing conforms easily to curved and uneven surfaces, while the flame-retardant construction provides additional safety benefits for critical applications.
Key Features
- Thermally conductive aluminum foil backing dissipates heat and reduces hot spots on temperature-sensitive materials
- Highly engineered pressure-sensitive acrylic adhesive provides long-term durability and clean removal
- Chemical resistant coating protects surfaces during de-paint and chemical masking operations
- Dead soft aluminum foil conforms to curved and uneven surfaces for superior coverage
- UL Recognized (UL 746C) and UL Classified (UL 723 Class L) with flame-retardant properties
- Withstands extreme temperature range from -65°F to 300°F (-54°C to 149°C)
- Heat and light reflective properties enhance heating and cooling efficiency
- Moisture and UV resistant for indoor and outdoor applications
- Meets FAR 25.853(a) and L-T-80C specifications for aerospace applications
- Single-sided adhesive design with 4.6-mil total thickness for optimal bonding strength
Technical Specifications
| Specification |
Value |
| Product Number | 425 |
| UPC Code | 00051125853354 |
| 3M ID | 7100053593 |
| Backing Material | Dead Soft Aluminum Foil |
| Adhesive Type | Pressure-Sensitive Acrylic |
| Product Color | Silver |
| Overall Width (Imperial) | 6 inches |
| Overall Width (Metric) | 15.2 centimeters |
| Overall Length (Imperial) | 60 yards |
| Overall Length (Metric) | 54.9 meters |
| Total Tape Thickness | 4.6 mil |
| Backing Thickness (Imperial) | 2.8 mil |
| Backing Thickness (Metric) | 0.07 millimeters |
| Adhesive Thickness (Imperial) | 1.8 mil |
| Adhesive Thickness (Metric) | 0.05 millimeters |
| Tensile Strength (Imperial) | 28 lb/in |
| Tensile Strength (Metric) | 49 N/100mm |
| Elongation at Break | 6 percent |
| 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 | 2 rolls |
| UL Certifications | UL 746C (File E 122798), UL 723 Class L (File R 7311) |
| Specifications Met | FAR 25.853(a), L-T-80C, SAE-AMS-T-23397 |
| Brand | 3M™ |
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