Premium 38" x 60 yard aluminum foil tape with acrylic adhesive for industrial heat shielding, thermal management, and chemical masking with UL certification and -65°F to 300°F operating range.
3M™ Aluminum Foil Tape 427 is a premium industrial-grade foil tape designed for demanding heat shielding, thermal management, and chemical masking applications. Featuring a dead soft aluminum foil backing with a highly engineered pressure-sensitive acrylic adhesive, this linered tape is ideal for die-cutting operations and provides superior thermal conductivity to dissipate heat and protect temperature-sensitive materials. The tape withstands exposure to high heat, humidity, moisture, weathering, UV radiation, and various solvents, making it suitable for both indoor and outdoor applications across aerospace, automotive, appliance, construction, electronics, and general industrial sectors.
This professional-grade tape measures 38 inches wide by 60 yards long with a total thickness of 4.6 mil and a backing thickness of 2.8 mil. It features an easy-release film liner at 3.1 mil thickness and delivers a tensile strength of 28 lb/in. The acrylic adhesive layer measures 1.8 mil thick, providing long-term durability while removing cleanly after harsh masking applications. The tape is UL Recognized to UL 746C and Classified by UL to UL 723 Class "L" for low flammability rating, meeting FAR 25.853(a) specifications.
Ideal applications include heat shielding of delicate parts, heat reflecting, chemical paint stripping masking, moisture barriers, light reflection for enhancement, chemical milling, seaming and sealing, refrigerator and freezer coil attachment, splicing of thin gauge foils, and plastic protection. With an operating temperature range from -65°F to 300°F (-54°C to 149°C), this tape combines reliability with versatility for industrial and occupational use.
Key Features
- Thermally conductive aluminum foil backing dissipates heat and improves heating/cooling efficiency
- Highly engineered acrylic adhesive provides long-term durability and clean removal after harsh masking
- Resistant to chemicals, moisture, weathering, UV radiation, and various solvents
- UL Recognized to UL 746C and Classified by UL to UL 723 Class L for low flammability
- Dead soft aluminum foil conforms to curved and uneven surfaces with superior flexibility
- Heat and light reflective properties protect surfaces and enhance lighting efficiency
- Linered version suitable for die-cutting and precision applications
- Operating temperature range from -65°F to 300°F (-54°C to 149°C)
- Meets FAR 25.853(a) specifications for aerospace and aviation applications
- Ideal for seaming, sealing, heat shielding, and chemical milling operations
Technical Specifications
| Specification |
Value |
| Product Name | 3M™ Aluminum Foil Tape 427 |
| Part Number | 427 |
| 3M Product Number | 427 |
| UPC Code | 00051125855600 |
| Color | Silver |
| Overall Width (Imperial) | 38 inches |
| Overall Width (Metric) | 965.2 millimeters |
| Overall Length (Imperial) | 60 yards |
| Overall Length (Metric) | 54.86 meters |
| Total Tape Thickness without Liner | 4.6 mil |
| Backing (Carrier) Thickness (Imperial) | 2.8 mil |
| Backing (Carrier) Thickness (Metric) | 0.07 millimeters |
| Adhesive Thickness (Imperial) | 1.8 mil |
| Adhesive Thickness (Metric) | 0.05 millimeters |
| Primary Liner | Easy Release Film |
| Primary Liner Thickness (Imperial) | 3.1 mil |
| Primary Liner Thickness (Metric) | 0.08 millimeters |
| Backing Material | Aluminum Foil - Dead Soft |
| Adhesive Type | Acrylic |
| Tensile Strength (Imperial) | 28 pounds per inch |
| Tensile Strength (Metric) | 49 Newtons per 100 millimeters |
| Elongation at Break | 6 percent |
| Minimum Operating Temperature (Fahrenheit) | -65°F |
| Minimum Operating Temperature (Celsius) | -54°C |
| Maximum Operating Temperature (Fahrenheit) | 300°F |
| Maximum Operating Temperature (Celsius) | 149°C |
| UL Certification | UL Recognized to UL 746C (File E 122798) and Classified by UL to UL 723 Class L |
| Flammability Rating | Class L - Low Flammability |
| Specifications Met | FAR 25.853(a) |
| Smallest Saleable Unit | Roll |
| Packaging | 1 Roll per Case |
| Brand | 3M™ |
| Industries | Aerospace, Appliance, Automotive, Construction, Electronics, General Industrial, Metalworking, Military, Military & Government, Specialty Vehicles, Transportation |
| Applications | Exterior Seams & Joints, Heat Shielding, Interior Seams & Joints, Painting & Depainting, Refrigerator and Freezer Coil Attachment, Sealing HVAC & Duct Work, Sealing Plate Edges Against Solvent Penetration, Shielding, Shielding From Engine Heat, Wiring Harness Attachment |
| Related Product | Linered version of 3M™ Aluminum Foil Tape 425 |
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