Benefits
- Helps protect temperature-sensitive materials from heat exposure in suitable applications.
- Supports thermal shielding, sealing, and splicing operations in industrial environments.
- Conforms to irregular surfaces to support effective tape placement.
- Helps distribute heat around covered components and surfaces.
- Maintains its position under specified high-temperature conditions.
- Offers flexibility for industrial assembly and thermal management applications.
Technical Specifications
| Property | Typical Specification |
|---|---|
| Product Name | 3M™ High Temperature Aluminum Foil Tape 433 |
| Backing Material | Aluminum foil |
| Adhesive Type | Silicone pressure-sensitive adhesive |
| Tape Color | Silver |
| Backing Thickness | 0.05 mm (2 mil) |
| Total Tape Thickness | 0.09 mm (3.6 mil) |
| Typical 180° Peel Adhesion | 4.4 N/cm (40 oz/in) on the stated test conditions |
| Tensile Strength | 35 N/cm |
| Elongation at Break | 3.5% |
| Temperature Performance | Up to 316°C (600°F) for specified high-temperature applications |
| Flame Resistance | Meets FAR 25.853(a) requirements |
| Liner | No liner on standard 433; 433L has an easy-release film liner |
Note: The values above are typical values from 3M technical literature, not guaranteed product specifications. Temperature performance depends on exposure duration and application conditions. The adhesive gradually thermosets at high temperatures, becoming firmer and losing pressure sensitivity while continuing to hold the tape in place. Confirm the latest regional technical data sheet before final selection.
Applications
- High-temperature heat shielding
- Sealing and joining thermal insulation materials
- Seaming and splicing aluminum foil
- Holding the final wrap of narrow aluminum foil rolls during metal annealing
- Covering selected heating elements or wires to help distribute heat
- Thermal management in industrial equipment
- Selected oven and appliance heat-shielding applications
Compatible Materials
Depending on surface condition and application requirements, 3M™ 433 may bond to:
- Aluminum and other suitable metal surfaces
- Aluminum foil and compatible foil-faced insulation
- Selected thermal insulation facings
- Suitable rigid and irregular industrial surfaces
- Selected equipment components requiring heat shielding
Adhesion depends on the surface finish, cleanliness, temperature, and application conditions. Test compatibility before use, particularly on coated, contaminated, or low-surface-energy materials.
Industries
- Industrial equipment manufacturing
- Aerospace applications requiring suitable flame-resistant materials
- Appliance and oven manufacturing
- Metal processing and annealing
- Thermal insulation and heat management
- Electrical equipment manufacturing
- Industrial maintenance and repair
Application suitability must be verified against the relevant engineering, safety, and regulatory requirements.
Why Choose 3M™ 433?
3M™ 433 combines a conformable aluminum foil backing with a silicone pressure-sensitive adhesive for selected high-temperature applications. Its thermal shielding capability, flame-resistance characteristics, and ability to conform to irregular surfaces make it an option for industrial heat management and insulation-related operations.
For manufacturers requiring custom tape shapes or dimensions, 3M™ 433L offers an easy-release film liner that can support precision die-cutting and converting processes.
Yousan can help evaluate tape converting requirements, including slit widths and die-cut shapes, subject to material availability, tooling feasibility, and the applicable product specifications.
Installation Guide
- Prepare the surface: Ensure the application surface is clean, dry, and free from oil, dust, grease, and other contaminants.
- Confirm application temperature: For best results, apply to a clean surface above 0°C. The manufacturer indicates an application range of approximately -18°C to 93°C.
- Measure and cut: Cut the tape to the required length or shape. For die-cut components, consider the 433L version with its easy-release liner.
- Apply evenly: Position the tape carefully and press it down to establish close contact with the surface.
- Inspect the application: Check for lifted edges, wrinkles, or gaps that could affect thermal shielding performance.
- Verify under operating conditions: Test the assembly under the intended temperature, exposure duration, and process conditions before production use.
Storage
- Store the tape in its original packaging in a clean, dry environment.
- Protect it from direct sunlight, excessive heat, moisture, and contamination.
- Avoid crushing or deforming the rolls.
- Follow the shelf-life and storage conditions stated in the current product documentation.
- Inspect the tape before use if it has been stored for an extended period.
FAQ
1. What is 3M™ High Temperature Aluminum Foil Tape 433 used for?
It is primarily used for high-temperature heat shielding, sealing, seaming, and splicing applications, including selected thermal insulation and industrial equipment applications.
2. What is the maximum temperature resistance of 3M 433?
3M lists performance up to 316°C (600°F) for specified high-temperature applications. This should not be interpreted as a guarantee of continuous service under every condition. Exposure duration and adhesive behavior must be considered.
3. What type of adhesive does 3M 433 use?
It uses a silicone pressure-sensitive adhesive designed to provide adhesion in high-temperature applications.
4. Is 3M 433 a pure aluminum foil tape?
It uses an aluminum foil backing coated with silicone adhesive. It is not an aluminum foil tape reinforced with glass cloth; that is a different product construction.
5. What is the difference between 3M 433 and 3M 433L?
Both use aluminum foil backing and silicone adhesive. The 433L version includes an easy-release film liner, which can be useful for handling and precision die-cutting. Confirm the specific product configuration before ordering.
6. Can 3M 433 be used for heat shielding?
Yes. Heat shielding is one of its intended applications. The suitability of a particular installation depends on the heat source, exposure time, substrate, and surrounding materials.
7. Is 3M 433 flame-resistant?
According to 3M product literature, it meets the requirements of FAR 25.853(a). Always verify the current documentation and the applicable compliance requirements for the intended application.
8. Can 3M 433 be die-cut into custom shapes?
For precision die-cutting, 3M 433L is the version specifically identified by 3M as suitable for easy converting into custom sizes and shapes.
9. Does 3M 433 leave adhesive residue after removal?
Removal behavior depends on the temperature exposure, dwell time, substrate, and application conditions. Because the adhesive can thermoset at high temperatures, residue-free removal should not be assumed without application-specific testing.
10. How should I select the right width and roll format?
Consider the coverage area, substrate geometry, application method, and required production format. Check the available product sizes and confirm any custom converting requirements with the supplier.
Downloads
Available upon request:
- 3M 433 Aluminum Foil Tape Technical Data Sheet (TDS)
- Safety Data Sheet (SDS)
- Product Brochure
- Die-Cutting Capability Guide
Please contact our sales team if you require the latest technical documentation.
