Premium silicone-based aluminum foil tape designed for extreme heat shielding, withstands up to 600°F, meets FAR 25.853(a) flame resistance standards, includes 2 rolls of 180 yards each.
3M™ High Temperature Aluminum Foil Tape 433L is a premium linered version of the standard 433 tape, specifically engineered for demanding heat shielding applications where extreme temperatures are a critical concern. This dead soft aluminum foil tape is coated with a clear silicone pressure-sensitive adhesive that provides exceptional bonding to a variety of surfaces, even in high-temperature environments where conventional adhesive tapes fail. The tape excels in seaming, sealing, and splicing applications, maintaining a strong and reliable bond across an impressive temperature range from -65°F to 600°F (-54°C to 316°C).
The 433L formulation features a thermally conductive backing that actively helps dissipate heat, protecting temperature-sensitive materials from thermal damage. With a 2 mil backing thickness and 1.5 mil adhesive layer, this tape provides optimal conformability to curved and uneven surfaces due to its dead soft aluminum composition. The product meets stringent flame resistance requirements of F.A.R. 25.853(a) and carries UL Recognized component status (file QQQW2.MH122798), making it suitable for aerospace, automotive, appliance, and industrial applications.
Each case contains 2 rolls of 180 yards per roll (164.59 meters), providing 360 total yards of coverage. The easy-release film liner ensures clean, hassle-free application and is ideal for die-cutting operations. With an 18-month shelf life and proven performance across multiple industries including aerospace, military, electronics, and general industrial sectors, this tape represents a reliable solution for heat shielding, thermal insulation wrapping, heating element protection, and other demanding high-temperature applications.
Key Features
- Withstands limited exposure up to 600°F (316°C) for superior heat shielding performance
- Thermally conductive tape actively dissipates heat to protect temperature-sensitive materials
- Dead soft aluminum foil backing conforms easily to curved and uneven surfaces
- Flame resistant meeting F.A.R. 25.853(a) requirements with UL Recognized component status
- Silicone pressure-sensitive adhesive bonds reliably to difficult substrates at high temperatures
- Linered version suitable for die-cutting and precision industrial operations
- Operates reliably across -65°F to 600°F temperature range
- Improves heating and cooling efficiency in thermal management applications
- Easy-release film liner ensures clean, hassle-free application
- 18-month shelf life for extended storage and availability
Technical Specifications
| Specification |
Value |
| Product Name | 3M™ High Temperature Aluminum Foil Tape 433L |
| Part Number | 433L |
| UPC Code | 00051131177635 |
| Backing Material | Dead Soft Aluminum Foil |
| Adhesive Type | Silicone Pressure-Sensitive |
| Backing Thickness (Imperial) | 2 mil |
| Backing Thickness (Metric) | 0.05 mm |
| Adhesive Thickness (Imperial) | 1.5 mil |
| Total Tape Thickness without Liner (Imperial) | 3.5 mil |
| Overall Width (Imperial) | 4 inches |
| Overall Width (Metric) | 101.6 mm |
| Overall Length per Roll (Imperial) | 180 yards |
| Overall Length per Roll (Metric) | 164.59 meters |
| Quantity per Case | 2 rolls |
| Total Coverage per Case | 360 yards (328 meters) |
| 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 |
| Flame Resistance Standard | F.A.R. 25.853(a) |
| UL Recognition | UL Recognized Component (File QQQW2.MH122798) |
| Brand | 3M™ |
| Suitable Industries | Aerospace, Appliance, Automotive, Construction, Electronics, General Industrial, Metalworking, Military, Military & Government, Specialty Vehicles, Transportation |
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