Premium polyester masking tape with silicone adhesive for extreme temperature applications ranging from -60°F to 425°F. Features clean removal, chemical resistance, and aerospace compliance. Ideal for composite bonding, anodization, and high-temperature masking.
3M™ Polyester Tape 8403 is a premium high-temperature masking tape designed for demanding industrial applications. This translucent green polyester tape features a silicone adhesive that provides exceptional performance in extreme temperature environments, ranging from -60°F (-50°C) to 425°F (218°C). The tape is specifically engineered for applications requiring clean removal from difficult surfaces, including silicone-coated papers, films, and composite materials. With its chemical-resistant backing and adhesive, it excels in harsh environments such as anodization processes and composite bonding operations.
The 3M Polyester Tape 8403 is a thicker version of the 3M Polyester Tape 8402, providing superior durability and extended wear life. The silicone adhesive ensures one-piece clean removal from most surfaces without leaving residue or causing surface damage. This makes it ideal for masking metal surfaces during acid or caustic chemical milling baths, flash breaker applications in metal bonding processes, and protective tape during handling and shipping. The tape's flexibility is maintained even in autoclave conditions, making it suitable for aerospace and high-temperature manufacturing environments.
Each case contains 96 rolls of tape, with each roll measuring 1/2 inch wide by 72 yards long with a 2.4 mil thickness. The tape meets several aerospace specifications including ASTM D3330, ASTM D3652, and ASTM D3759. Its translucent green backing is easily identifiable for splicing applications, and the pressure-sensitive silicone adhesive performs reliably across a broad range of temperatures and chemical environments. Whether used for splicing silicone liners, holding parts during composite bonding, or masking in high-temperature paint bake cycles, the 3M Polyester Tape 8403 delivers consistent, reliable performance in the most demanding industrial applications.
Key Features
- Extreme Temperature Performance: Operates reliably from -60°F (-50°C) to 425°F (218°C) while maintaining flexibility in autoclave conditions
- Silicone Adhesive Technology: Provides clean, one-piece removal from most surfaces without residue or damage
- Chemical Resistant: Durable backing and adhesive withstand harsh environments including anodization and chemical milling baths
- Superior Durability: Thicker polyester construction (2.4 mil) offers extended wear life compared to standard formulations
- Aerospace Compliance: Meets ASTM D3330, ASTM D3652, and ASTM D3659 specifications for aerospace applications
- Ideal for Difficult Surfaces: Bonds exceptionally well to silicone-coated papers, films, and composite materials
- Easily Identifiable: Translucent green backing clearly marks splicing applications for easy identification
- Versatile Applications: Perfect for splicing, masking, composite bonding, flash breaking, and protective applications
Technical Specifications
| Specification |
Value |
| Product Number | 3M 8403 |
| 3M ID | 7100245633 |
| UPC Code | 00638060410011 |
| Overall Width (Imperial) | 0.5 in |
| Overall Width (Metric) | 12.7 mm |
| Overall Length (Imperial) | 72 yd |
| Overall Length (Metric) | 65.837 m |
| Backing Material | Polyester |
| Backing Thickness (Imperial) | 1.4 in |
| Backing Thickness (Metric) | 0.04 mm |
| Tape Thickness | 2.4 mil |
| Adhesive Type | Silicone |
| Product Color | Green (Translucent) |
| Tensile Strength (Imperial) | 46 lb/in |
| Tensile Strength (Metric) | 71.8 N/100mm |
| Elongation at Break | 140% |
| Minimum Operating Temperature (Fahrenheit) | -60°F |
| Minimum Operating Temperature (Celsius) | -50°C |
| Maximum Operating Temperature (Fahrenheit) | 425°F |
| Maximum Operating Temperature (Celsius) | 218°C |
| Smallest Saleable Unit | Roll |
| Rolls Per Case | 96 Rolls |
| Specifications Met | ASTM D3330, ASTM D3652, ASTM D3759 |
| Application Type | High Temperature Masking |
| Brand | 3M™ |
| Industries | Aerospace, Appliance, Automotive, Construction, Electronics, General Industrial, Marine, Metalworking, Military & Government, Paper, Print, Specialty Vehicles, Transportation |
| Use Designation | Industrial/Occupational Use Only |
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