Even the best Parylene coating cannot perform reliably if the surface beneath it is not properly prepared. Adhesion failures, delamination, and reduced barrier performance often trace back to poor substrate preparation. That’s why surface preparation is one of the most critical steps before Parylene deposition.
Parylene is applied via vapor deposition, forming a thin, uniform layer that reaches every exposed surface. However, if the substrate has contamination, low surface energy, or residues, the Parylene may not bond properly—resulting in peeling, flaking, or reduced adhesion.
Correct preparation ensures:
– Strong coating adhesion
– Reliable moisture and chemical protection
– Consistent long-term performance
Cleaning: Removing Contaminants
Before applying adhesion promoters, thorough cleaning is essential. Residues like flux, oils, or dust can prevent the coating from bonding properly. Techniques include:
– Solvent cleaning for organic residues
– Ultrasonic cleaning for precision components
– Controlled drying to avoid recontamination
Adhesion Promoters: Creating Reliable Bonding Sites
Adhesion promoters (such as silane-based primers) are widely used to enhance Parylene’s bonding strength. These chemical agents modify the substrate surface to create functional groups that improve adhesion. They are particularly effective on low-energy materials such as plastics, ceramics, or glass, ensuring Parylene bonds securely and permanently.
By combining effective cleaning with adhesion promoters, manufacturers can achieve optimal performance, preventing delamination and ensuring coatings that last.
SCH Services Ltd: Proven Preparation and Coating Expertise
At SCH Services Ltd, we combine cleaning and adhesion promoter treatments with expert Parylene deposition to deliver coatings that bond reliably across all substrates. Because we apply these techniques in our own coating services, customers benefit from proven processes designed for maximum performance.
