Benefits
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Improves handling and positioning for precision converting applications.
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Helps simplify the production of custom-cut tape components, subject to converting trials.
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Supports splicing of silicone-coated release liners, papers, and films.
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Helps protect metal surfaces from scratches during handling and transportation.
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Provides reliable masking performance during suitable high-temperature processes.
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Helps reduce adhesive residue when removed under recommended conditions.
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Offers a practical solution for applications requiring both silicone adhesive and a release liner.
Technical Specifications
| Property | Typical specification |
|---|---|
| Product name | 3M™ Polyester Tape 8403L |
| Product series | 8403 / 8403L |
| Backing material | Polyester film |
| Adhesive type | Silicone |
| Color | Green, translucent |
| Backing thickness | 0.04 mm |
| Tape thickness, excluding liner | 0.06 mm |
| Adhesion to steel | 29 N/100 mm |
| Tensile strength | 806 N/100 mm |
| Elongation at break | Approximately 150% |
| Published temperature-use range | -50°C to 218°C |
| Release liner | Yes |
| Standard roll length | Confirm with the selected product configuration |
| Available widths | Subject to product availability |
| Product format | Linered roll; converted formats subject to evaluation |
Important: Published specifications for the 8403/8403L series are shown as reference values. The release-liner material and thickness, exact roll dimensions, and availability of specific configurations should be confirmed with the applicable 3M technical documentation or supplier before ordering. Temperature suitability depends on the application and exposure duration.
Applications
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Splicing silicone-coated release liners
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Splicing silicone-treated paper and film
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Precision masking for high-temperature processing
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Masking metal surfaces during selected anodizing processes
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Holding materials during composite bonding operations
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Holding vacuum bags during composite processing
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Flash breaking during selected metal bonding operations
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Temporary protection of surfaces during handling and shipping
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Custom die-cut tape components for industrial applications
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Applications requiring a linered silicone adhesive polyester tape
Compatible Materials
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Silicone-coated release liners
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Silicone-treated papers
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Silicone-treated films
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Stainless steel
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Aluminum and selected metal surfaces
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Composite manufacturing materials
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Selected industrial tooling and fixtures
Compatibility depends on the substrate, surface condition, process chemicals, temperature, and exposure duration. Test on the intended material before production use.
Industries
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Aerospace and aviation
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Automotive manufacturing
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Electronics manufacturing
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Appliance manufacturing
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Composite manufacturing
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Metal fabrication and finishing
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Printing and paper converting
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Industrial equipment manufacturing
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Construction and transportation
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General industrial manufacturing
Why Choose 3M 8403L Polyester Tape?
3M 8403L combines a green translucent polyester backing, silicone adhesive, and a release liner to support high-temperature masking and precision converting applications.
Compared with unlined 3M 8403, the linered version is more convenient for handling and may be more suitable for applications involving pre-cut shapes or converted components. Its silicone adhesive also makes it useful for bonding to selected silicone-treated surfaces, including release liners, papers, and films.
Yousan can help assess requirements for custom widths, slit rolls, and die-cut components, subject to material availability and technical review.
Installation Guide
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Prepare the substrate: Ensure the application surface is clean and free from oil, dust, moisture, and other contaminants.
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Check compatibility: Test adhesion and removal on the actual substrate and process materials.
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Position the tape: Align the tape with the intended masking boundary, splice, or component location.
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Apply consistent pressure: Press the exposed adhesive surface into contact with the substrate while avoiding wrinkles and trapped air.
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Remove the release liner: Peel away the liner carefully without contaminating or stretching the tape.
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Verify process conditions: Confirm that the temperature, exposure time, and chemical environment are suitable for the application.
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Remove after processing: Follow the validated process instructions and remove the tape steadily to minimize tearing or residue.
Storage
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Store in a clean, dry environment.
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Keep away from direct sunlight and excessive heat or humidity.
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Retain the tape in its original packaging until use.
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Keep the release liner intact until the tape is ready to be applied or converted.
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Protect the adhesive surface from dust, oil, and other contaminants.
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Follow the storage conditions and shelf-life guidance in the applicable 3M documentation.
FAQ
Q1: What is 3M 8403L polyester tape used for?
It is used for high-temperature masking, silicone-treated liner and film splicing, composite processing, and selected industrial converting applications.
Q2: What is the difference between 3M 8403 and 3M 8403L?
The main distinction is that 8403L is the linered version of 8403. The release liner supports easier handling and may simplify precision converting or die-cutting.
Q3: What adhesive does 3M 8403L use?
It uses silicone adhesive, designed for heat-resistant applications and adhesion to selected silicone-treated surfaces.
Q4: What is the thickness of 3M 8403L?
The 3M catalog lists approximately 0.06 mm for the tape itself. The release liner adds thickness, and its exact specification should be confirmed for the selected product configuration.
Q5: What is the temperature range of 3M 8403L?
The 3M catalog lists a temperature-use range of -50°C to 218°C for the 8403/8403L series. This is not a guarantee of performance for every exposure duration or process; validate the actual operating conditions before use.
Q6: Can 3M 8403L adhere to silicone-coated release paper?
The 8403 series is designed for applications involving silicone-treated liners, papers, and films. Confirm suitability with the exact material and process conditions.
Q7: Can 3M 8403L be die-cut into custom shapes?
Its release liner may support converting into custom shapes, depending on the required geometry, tolerances, and process. A converting trial is recommended before production.
Q8: Can 3M 8403L be used for anodizing?
The 8403 series is used for selected metal-masking and metal-finishing processes. Confirm chemical compatibility and exposure conditions before using it in a specific anodizing bath.
Downloads
Available upon request:
- 3M 8403L Polyester Tape Technical Data Sheet (TDS)
- Safety Data Sheet (SDS)
- Adhesive Tape Selection Guide
- Product Brochure
- Die-Cutting Capability Guide
Please contact our sales team if you require the latest technical documentation.
