Product Introduction of 3M Scotch-Weld Composite Surfacing Film AF 325LS
3M Scotch-Weld Composite Surfacing Film AF 325LS Blue is a thermosetting epoxy surfacing film developed for advanced composite applications. This product delivers a smooth, void-free surface with minimal pinholes, effectively reducing the need for subsequent surface filling, fairing, sanding, and pre-paint preparation. It is available in both white and blue to provide color contrast with the underlying composite prepreg, offering versatility for different manufacturing needs. In addition, this film incorporates copper mesh for lightning strike protection, making it ideal for critical aerospace applications.
AF 325 LS Blue offers excellent operational performance across a broad temperature range, from -67°F (-55°C) to 300°F (149°C). It is co-cure compatible with most epoxy composite prepreg systems at both 250°F (121°C) and 350°F (177°C). The low-density formulation supports easier surface preparation and enhances overall process efficiency. The inclusion of copper mesh provides an added layer of protection against lightning strikes while maintaining a smooth surface finish with minimal surface imperfections.
Key Features
- Excellent for surfacing composite parts
- Available in both white and blue to provide color contrast to underlying composite prepreg
- Co-cure compatible with most epoxy composite prepreg systems
- Provides a smooth surface with minimal pinholes and other surface imperfections
- Reduces the need for subsequent surface filling, fairing, and sanding operations
- Low density formulation aids in pre-paint surface preparation
- Operational performance range from -67°F (-55°C) to 300°F (149°C)
- Available with copper mesh for lightning strike protection
Key Applications
- Surfacing aerospace composite structures requiring lightning strike protection
- Applications demanding smooth, pinhole-free composite finishes
- Use with composite prepreg systems requiring co-curing at 250°F (121°C) or 350°F (177°C)
- Pre-paint surface preparation for aerospace components
- Composite manufacturing where minimal post-cure surface preparation is desired
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| Property | Value |
|---|---|
| Adhesive Type | Epoxy |
| Brands | Scotch-Weld™ |
| Cure Rate | 1 hr |
| Factory ISO Certification | No ISO Certification information available |
| Maximum Cure Conditions (Celsius) | 177 ℃ |
| Maximum Cure Conditions (Fahrenheit) | 350 ℉ |
| Maximum Operating Temperature (Celsius) | 149 ℃ |
| Maximum Operating Temperature (Fahrenheit) | 300 ℉ |
| Minimum Cure Conditions (Celsius) | 121 ℃ |
| Minimum Cure Conditions (Fahrenheit) | 250 ℉ |
| Minimum Operating Temperature (Celsius) | -55 ℃ |
| Minimum Operating Temperature (Fahrenheit) | -67 ℉ |
| Nominal Weight (Imperial) | 0.064 lb/ft² |
| Product Color | Blue |
| Product Form | Roll |
| Storage Environment | Freezer Storage |
| Overall Length (Imperial) | 50 yd |
| Overall Length (Metric) | 45.7 m |
| Overall Width (Imperial) | 35 in |
| Overall Width (Metric) | 1 m |
