Industrial-grade aluminum foil tape with silicone adhesive for extreme heat shielding applications up to 600°F, featuring dead soft backing for curved surfaces and flame-resistant properties meeting F.A.R. 25.853(a) standards.
The 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 industrial-grade tape features dead soft aluminum foil backing that easily conforms to curved and uneven surfaces, combined with a clear silicone pressure-sensitive adhesive that bonds reliably to a variety of difficult substrates. The tape maintains exceptional performance across a wide temperature range from -65°F to 600°F (-54°C to 316°C), making it ideal for applications requiring thermal management and heat protection.
Designed for professional industrial use, this aluminum foil tape excels in seaming, splicing, and sealing operations where high temperatures are a primary concern. The silicone adhesive formulation ensures strong and reliable bonding even under extreme thermal stress, where conventional pressure-sensitive tapes would fail. The tape is flame-resistant and meets stringent F.A.R. 25.853(a) requirements, while also being UL Recognized as a component (file QQQW2.MH122798), ensuring compliance with aerospace and industrial safety standards.
Each roll measures 19 1/4 inches wide by 180 yards long with a total thickness of 3.5 mil, providing substantial coverage for large-scale industrial applications. The linered construction with easy-release film backing makes it suitable for die-cutting operations and precision applications. This tape is ideal for heat shielding over thermal insulation, splicing jumbo rolls, holding the last lap of narrow-width rolls during metal annealing, and covering heating elements or wires to distribute heat effectively.
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 with ease
- Clear silicone pressure-sensitive adhesive bonds reliably to difficult substrates
- Flame resistant and meets F.A.R. 25.853(a) requirements for aerospace applications
- UL Recognized component (file QQQW2.MH122798) for safety compliance
- Thermally conductive tape helps dissipate heat to protect temperature-sensitive materials
- Linered version suitable for die-cutting operations and precision applications
- Excellent performance range from -65°F to 600°F (-54°C to 316°C)
- Improves heating and cooling efficiency in industrial systems
- Ideal for seaming, splicing, and sealing applications at high temperatures
Technical Specifications
| Specification |
Value |
| Product Number | 433L |
| Brand | 3M™ |
| Backing Material | Dead Soft Aluminum Foil |
| Adhesive Type | Silicone Pressure-Sensitive |
| Overall Width (Imperial) | 19.25 inches |
| Overall Width (Metric) | 488.95 mm |
| Overall Length (Imperial) | 180 yards |
| Overall Length (Metric) | 164.59 meters |
| Total Tape Thickness without Liner (Imperial) | 3.5 mil |
| Backing (Carrier) Thickness (Imperial) | 2 mil |
| Backing (Carrier) Thickness (Metric) | 0.05 mm |
| Back Side Adhesive Thickness (Imperial) | 1.5 mil |
| 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 |
| Units per Case | 1 Roll |
| Smallest Saleable Unit | Roll |
| Specifications Met | FAR 25.853(a) |
| UL Recognition | UL Recognized Component (File QQQW2.MH122798) |
| UPC Code | 00051138962074 |
| 3M ID | 7010290638 |
| Recommended Applications | Heat shielding, thermal insulation wrapping, metal annealing, heating element coverage |
| Industries Served | Aerospace, Appliance, Automotive, Construction, Electronics, General Industrial, Metalworking, Military, Specialty Vehicles, Transportation |
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