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250/350 Degree Fahrenheit
Maximum Operating Temperature (Celsius)
149 Degree Celsius
Maximum Operating Temperature (Fahrenheit)
300 Degree Fahrenheit
Minimum Operating Temperature (Fahrenheit)
-67 Degree Fahrenheit
Overall Length (Imperial)
Overall Length (Metric)
Overall Width (Imperial)
Overall Width (Metric)
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
3M™ Scotch-Weld™ Composite Surfacing Film AF 325 LS Blue is a thermosetting epoxy that we developed as an excellent product for surfacing composites, where its smooth, void-free surface with minimal pinholes reduces the need for subsequent surface fill or finishing and pre-paint prep. It includes copper mesh for lightning strike protection.
Available in both white and blue to provide color contrast, 3M™ Scotch-Weld™ Composite Surfacing Film AF 325 reduces the need for subsequent surface filling, fairing and sanding operations
It's About the Surface
3M™ Scotch-Weld™ Composite Surfacing Film AF 325 LS Blue is a low density film that provides excellent temperature range performance from -67°F (-55°C) to 300°F (149°C) for applications required in the aerospace industry. This surfacing film is available in both white and blue, which provides color contrast to underlying composite prepreg. AF 325 LS Blue is co-cure compatible with most epoxy composite prepreg systems at both 250°F (121°C) and 350°F (177°C). For surfacing applications, AF 325 LS Blue provides a smooth surface with minimal pinholes and other surface imperfections, which reduces the need for subsequent surface filling, fairing and sanding operations. The copper mesh provides lightning strike protection.
Our Best for Your Best
3M is proud to partner with organizations across the spectrum of aerospace and related industries. Creating efficiencies, reducing process times and lowering aircraft weight is how we execute our never-ending mission to offer best-in-class adhesives, sealants and other products that effectively reduce costs on multiple fronts. Professionals across the industry know the cost-saving advantages of 3M™ Aerospace. Our brand is widely recognized for the highest standards of quality and performance and adds value to the final results. By engineering reliability, longevity and performance into all of our products, we have a history of saving money by reducing waste, rework and time.
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