Premium high-temperature aluminum foil tape with silicone adhesive, rated to 600°F, ideal for heat shielding, thermal insulation, and demanding industrial sealing applications.
The 3M™ High Temperature Aluminum Foil Tape 433L is a premium linered version of the standard 433 model, specifically engineered for demanding heat shielding applications. This dead soft aluminum foil tape is coated with a clear silicone pressure-sensitive adhesive that creates a strong, reliable bond on a variety of difficult substrates, even in extreme temperature environments where conventional adhesive tapes fail. The tape features exceptional thermal conductivity properties that help dissipate heat effectively, protecting temperature-sensitive materials and components from thermal damage.
Designed for industrial and occupational use, this high-performance tape can withstand limited exposure up to 600°F (316°C), making it ideal for applications involving thermal insulation wrapping, seaming, sealing, and splicing operations. The dead soft aluminum backing conforms easily to curved and uneven surfaces, providing complete coverage and superior adhesion. The tape maintains a stable performance range from -65°F to 600°F (-54°C to 316°C) and meets stringent flame resistance requirements of F.A.R. 25.853(a), making it suitable for aerospace and aviation applications.
With its linered construction featuring an easy-release film backing, this tape is particularly suitable for die-cutting operations and converting applications. Each roll measures 13 3/4 inches wide by 180 yards long with a total thickness of 3.5 mil, providing ample coverage for industrial applications. The 18-month shelf life ensures reliable performance when properly stored, and the UL Recognized component status (file QQQW2.MH122798) confirms compliance with industry standards for safety and reliability.
Key Features
- Withstands limited exposure up to 600°F (316°C) for extreme heat shielding applications
- Dead soft aluminum foil backing conforms to curved and uneven surfaces for superior coverage
- Silicone pressure-sensitive adhesive bonds reliably to difficult substrates even at high temperatures
- Thermally conductive properties help dissipate heat and protect temperature-sensitive materials
- Flame resistant - meets F.A.R. 25.853(a) requirements and is UL Recognized (file QQQW2.MH122798)
- Linered with easy-release film backing suitable for die-cutting and converting operations
- Performs reliably across wide temperature range from -65°F to 600°F (-54°C to 316°C)
- Improves heating and cooling efficiency in industrial thermal management applications
Technical Specifications
| Specification |
Value |
| Product Name | 3M High Temperature Aluminum Foil Tape 433L |
| Part Number | 433L |
| 3M Product Number | 433L |
| 3M ID | 7010334803 |
| UPC | 00051138961176 |
| Backing Material | Aluminum Foil - Dead Soft |
| Backing Thickness (Imperial) | 2 mil |
| Backing Thickness (Metric) | 0.05 mm |
| Adhesive Type | Silicone Pressure-Sensitive |
| Adhesive Thickness (Imperial) | 1.5 mil |
| Total Tape Thickness (Imperial) | 3.5 mil |
| Overall Width (Imperial) | 13.75 in (13 3/4 in) |
| Overall Width (Metric) | 349.25 mm |
| Overall Length (Imperial) | 180 yd |
| Overall Length (Metric) | 164.59 m |
| Tensile Strength (Imperial) | 20 lb/in |
| Tensile Strength (Metric) | 35 N/100mm |
| Elongation at Break | 3.5% |
| Maximum Operating Temperature (Fahrenheit) | 600°F |
| Maximum Operating Temperature (Celsius) | 316°C |
| Minimum Operating Temperature (Fahrenheit) | -65°F |
| Minimum Operating Temperature (Celsius) | -54°C |
| Product Color | Silver |
| Primary Liner | Easy Release Film |
| Shelf Life | 18 Months |
| Smallest Saleable Unit | Roll |
| Units per Case | 1.0 |
| Specifications Met | FAR 25.853(a) |
| Brand | 3M™ |
| UL Recognition | UL Recognized Component (File QQQW2.MH122798) |
| Applicable Industries | Aerospace, Appliance, Automotive, Construction, Electronics, General Industrial, Metalworking, Military, Military & Government, Specialty Vehicles, Transportation |
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