Industrial-grade aluminum foil tape with acrylic adhesive for heat shielding, chemical masking, and thermal protection. UL certified, temperature rated to 300°F, case of 48 rolls.
3M™ Aluminum Foil Tape 425 is a premium industrial-grade foil tape engineered for demanding applications across aerospace, automotive, construction, and manufacturing industries. Featuring a dead soft aluminum foil backing combined with a highly engineered acrylic adhesive, this tape delivers exceptional thermal conductivity and chemical resistance. The tape excels at heat shielding, thermal reflecting, chemical masking, and protective sealing applications while maintaining superior bond strength even under extreme conditions.
This versatile tape is specifically designed to dissipate heat and improve heating and cooling efficiency, protecting temperature-sensitive materials from thermal damage. With its proven ability to withstand exposure to high temperatures up to 300°F (149°C), harsh chemicals, moisture, weathering, and UV radiation, it provides reliable long-term performance in both indoor and outdoor environments. The acrylic adhesive formulation ensures clean removal after masking operations without leaving residue, making it ideal for de-paint processes and other chemical stripping applications.
UL recognized to UL 746C and classified by UL to UL 723 Class 'L' for low flammability rating, this tape meets stringent safety and performance standards including FAR 25.853(a) and L-T-80C specifications. Each case contains 48 rolls of 19mm width × 55m length, providing ample coverage for industrial production environments. The 4.6 mil total thickness offers optimal balance between conformability and durability, allowing the tape to conform seamlessly to curved and uneven surfaces while maintaining structural integrity.
Key Features
- Thermally conductive aluminum foil backing dissipates heat and improves heating/cooling efficiency
- Highly engineered acrylic adhesive provides long-term durability with clean removal after masking
- Chemical resistant formulation protects surfaces during de-paint and chemical stripping operations
- Dead soft aluminum foil conforms to curved and uneven surfaces for perfect coverage
- Flame retardant with UL certifications for aerospace and automotive compliance
Technical Specifications
| Specification |
Value |
| Product Name | 3M™ Aluminum Foil Tape 425 |
| Part Number | 425 |
| UPC Code | 00051125853149 |
| Backing Material | Dead Soft Aluminum Foil |
| Adhesive Type | Acrylic, Pressure Sensitive |
| Color | Silver |
| Overall Width | 19 mm (0.74 in) |
| Overall Length | 55 m (60.14 yards) |
| Total Thickness | 4.6 mil |
| Backing Thickness | 2.8 mil (0.07 mm) |
| Adhesive Thickness | 1.8 mil (0.05 mm) |
| Tensile Strength | 28 lb/in (49 N/100mm) |
| Elongation at Break | 6% |
| Maximum Operating Temperature | 300°F (149°C) |
| Minimum Operating Temperature | -65°F (-54°C) |
| Temperature Range | -65°F to 300°F (-54°C to 149°C) |
| Flame Retardant | Yes |
| UL Certifications | UL 746C (File E 122798), UL 723 Class L |
| Specifications Met | FAR 25.853(a), L-T-80C, SAE-AMS-T-23397 |
| Number of Adhesive Sides | Single-sided |
| Units per Case | 48 rolls |
| Shelf Life | 24 months |
| Smallest Saleable Unit | Roll |
| 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, sealing, refrigerator and freezer coil attachment, splicing, plastic protection |
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