Premium high-temperature aluminum foil tape with silicone adhesive for extreme heat applications up to 600°F, ideal for aerospace and industrial sealing.
3M™ High Temperature Aluminum Foil Tape 433L is a premium linered aluminum foil 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 bonds exceptionally well to a variety of surfaces and excels in high temperature environments where standard adhesive tapes fail. The tape can withstand limited exposure up to 600°F (316°C), making it ideal for aerospace, automotive, appliance, and industrial applications requiring reliable thermal protection.
The 3M™ High Temperature Aluminum Foil Tape 433L features a thermally conductive backing that helps dissipate heat to protect temperature sensitive materials and components. With its dead soft aluminum foil construction, this tape conforms easily to curved and uneven surfaces, providing superior coverage and seal integrity. The silicone adhesive maintains its bonding strength across an impressive temperature range from -65°F to 600°F (-54°C to 316°C), ensuring reliable performance in both extreme cold and heat applications. This linered version is specifically designed for die cutting operations and is suitable for splicing, sealing, and seaming applications.
The product meets rigorous industry standards including FAR 25.853(a) flame resistance requirements and is a UL Recognized component (file QQQW2.MH122798). Each roll measures 22 inches wide by 60 yards long with a total tape thickness of 3.5 mil, backed by an easy release film liner. The 433L version includes a 1.5 mil adhesive thickness and 2 mil backing thickness, providing optimal balance between flexibility and durability. This industrial-grade tape is ideal for high temperature heat shielding, splicing jumbo rolls, metal annealing processes, and covering heating elements or wires to distribute heat effectively.
Key Features
- Withstands temperatures up to 600°F (316°C) for high temperature heat shielding applications
- Dead soft aluminum foil backing conforms to curved and uneven surfaces for superior coverage
- Thermally conductive tape dissipates heat to protect temperature sensitive materials and components
- Silicone pressure sensitive adhesive bonds reliably to difficult substrates even at extreme temperatures
- Flame resistant with FAR 25.853(a) compliance and UL Recognized component certification
- Linered version suitable for die cutting operations and precision industrial applications
- Operating temperature range from -65°F to 600°F (-54°C to 316°C) for versatile use
- Easy release film liner for convenient application and handling
- Improves heating and cooling efficiency in thermal management systems
- Ideal for seaming, splicing, sealing, and high temperature bonding applications
Technical Specifications
| Specification |
Value |
| Product Name | 3M™ High Temperature Aluminum Foil Tape 433L |
| Part Number | 433L |
| UPC Code | 00051115177309 |
| Backing Material | Dead Soft Aluminum Foil |
| Adhesive Type | Silicone Pressure Sensitive |
| Product Color | Silver |
| Overall Width (Imperial) | 22 inches |
| Overall Width (Metric) | 558.8 millimeters |
| Overall Length (Imperial) | 60 yards |
| Overall Length (Metric) | 54.86 meters |
| Total Tape Thickness (without liner) | 3.5 mil |
| Backing Thickness (Imperial) | 2 mil |
| Backing Thickness (Metric) | 0.05 millimeter |
| Adhesive Thickness (Imperial) | 1.5 mil |
| Maximum Operating Temperature (Fahrenheit) | 600°F |
| Maximum Operating Temperature (Celsius) | 316°C |
| Minimum Operating Temperature (Fahrenheit) | -65°F |
| Minimum Operating Temperature (Celsius) | -54°C |
| Tensile Strength (Imperial) | 20 lb/in |
| Tensile Strength (Metric) | 35 N/100mm |
| Elongation at Break | 3.5% |
| Primary Liner | Easy Release Film |
| Shelf Life | 18 months |
| Units per Case | 1 roll |
| Smallest Saleable Unit | Roll |
| Specifications Met | FAR 25.853(a), UL Recognized (File QQQW2.MH122798) |
| Brand | 3M™ |
| Industries Applicable | Aerospace, Appliance, Automotive, Construction, Electronics, General Industrial, Metalworking, Military, Specialty Vehicles, Transportation |
| Recommended Applications | High temperature heat shielding, splice jumbo rolls, metal annealing, heating element coverage |
| Flame Resistance | Meets F.A.R. 25.853(a) requirements |
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