3M 8403 High Temperature Polyester Tape | Green Silicone Adhesive Tape

Benefits

• Enables reliable splicing of silicone-coated release liners, papers, and films.

• Helps maintain masking integrity during high-temperature processing.

• Supports clean removal from many surfaces, helping reduce adhesive residue.

• Helps protect metal components against scratches during handling and shipping.

• Provides a clearly visible green backing for easier placement and inspection.

• Offers a practical solution for composite manufacturing and metal bonding operations.

Technical Specifications

Property	Typical specification
Product name	3M™ Polyester Tape 8403
Backing material	Polyester film
Adhesive type	Silicone
Color	Green, translucent
Backing thickness	0.04 mm
Total tape thickness	0.06 mm
180° peel adhesion to steel	2.7 N/cm
Tensile strength	71.8 N/cm
Elongation at break	140%
Temperature performance	Remains flexible and removes cleanly after 3 hours at 177°C in an autoclave, according to the TDS
Standard roll length	Approximately 65.8 m
Release liner	No liner
Available widths	Multiple widths, depending on product configuration
Product format	Roll

Note: Values are typical reference data from 3M documentation and are not guaranteed specifications. Actual performance depends on the substrate, exposure duration, process conditions, and product configuration. Refer to the applicable regional 3M Technical Data Sheet (TDS) before specifying the tape.

Applications

• Splicing silicone-coated release liners

• Splicing silicone-treated papers and films

• Holding bagging materials during composite bonding

• Holding parts during metal bonding operations

• Masking metal surfaces during anodizing

• Masking in selected high-temperature paint processes

• Masking during selected chemical milling processes

• Flash breaking during metal bonding

• Temporary surface protection during handling and shipping

• High-temperature industrial masking

Compatible Materials

• Silicone-coated release liners

• Silicone-treated paper

• Silicone-treated films

• Stainless steel

• Aluminum and selected metal surfaces

• Composite processing materials

• Selected industrial tooling and fixtures

Compatibility depends on the surface condition, process chemicals, temperature, and exposure time. Test the tape on the actual substrate before production use.

Industries

• Aerospace and aviation

• Automotive manufacturing

• Appliance manufacturing

• Electronics manufacturing

• Composite manufacturing

• Metal fabrication and finishing

• Printing and paper converting

• Industrial equipment manufacturing

• Construction and transportation

• General industrial manufacturing

Why Choose 3M 8403 Polyester Tape?

3M 8403 combines a polyester film backing with silicone adhesive to support applications that require heat resistance, flexibility, and adhesion to silicone-treated materials.

Its green translucent backing helps operators identify taped areas, while its thin construction is useful for splicing and masking operations where a low-profile tape is preferred. It is particularly suited to silicone liner splicing, composite processing, and selected metal finishing applications.

Yousan can help customers evaluate adhesive tape requirements and discuss sourcing, slit-width options, and converting possibilities, subject to product availability and technical review.

Installation Guide

1. Prepare the surface: Ensure the surface is clean and free from dust, oil, moisture, and other contaminants.

2. Check compatibility: Test adhesion and removal on the actual material, especially silicone-treated surfaces.

3. Position the tape: Align the tape accurately along the intended splice or masking boundary.

4. Apply consistent pressure: Press the tape firmly to achieve uniform contact and avoid wrinkles or trapped air.

5. Verify process conditions: Confirm that the temperature, exposure time, and chemical environment are suitable for the application.

6. Remove when required: Follow the validated process instructions and remove the tape steadily to minimize tearing or residue.

Storage

• Store in a clean, dry environment.

• Keep away from direct sunlight and excessive heat or humidity.

• Retain the tape in its original packaging until use.

• Protect the adhesive surface from dust, oil, and other contaminants.

• Follow the storage and shelf-life guidance in the applicable 3M documentation.

FAQ

Q1: What is 3M 8403 polyester tape used for?
It is used for splicing silicone-treated liners, papers, and films; holding materials during composite and metal bonding; high-temperature masking; and selected metal finishing processes.

Q2: What color is 3M 8403 tape?
It has a green, translucent polyester backing that helps make application and inspection easier.

Q3: What adhesive does 3M 8403 use?
It uses silicone adhesive, which provides heat-resistant performance and adhesion to many silicone-treated surfaces.

Q4: What is the thickness of 3M 8403?
The official technical data sheet lists a typical total thickness of 0.06 mm, including a polyester backing thickness of 0.04 mm.

Q5: What temperature can 3M 8403 withstand?
The TDS reports clean removal and retained flexibility after three hours at 177°C in an autoclave. Actual suitability depends on the application and exposure conditions; confirm the required temperature and duration before use.

Q6: Can 3M 8403 stick to silicone-coated release paper?
Yes. It is specifically designed for applications involving silicone-treated papers and films. Testing with the actual liner is recommended.

Q7: Is 3M 8403 suitable for anodizing?
It is used for masking metal surfaces in anodizing and other demanding metal finishing processes. Verify compatibility with the specific chemicals and process conditions.

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Downloads

Available upon request:

• 3M 8403 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.