Conformal Coating Removal: Local and Full Stripping

Conformal coating removal is a critical step in PCB repair and rework. Removal may be required locally—for exposing pads, connectors, or components—or across the entire assembly when full stripping is needed. Choosing the right method ensures coatings are removed effectively without damaging sensitive electronics.

Infographic showing conformal coating removal methods with icons for local repair and full stripping, including chemical stripping, micro-abrasion, thermal and mechanical techniques.

Local vs Full Conformal Coating Removal

  • Local Removal: Selectively removes coating around a connector, pad, or component to enable rework, soldering, or diagnostics. Precision is key to avoid damaging surrounding areas.
  • Full Stripping: Removes all conformal coating from the assembly, typically required when assemblies are re-coated with a new material or when widespread repair is necessary.

Methods for Conformal Coating Removal

  • Wet Chemical Stripping: Solvents or chemical agents dissolve or swell the coating. Best for acrylics, urethanes, and silicones. Not effective against Parylene or fluoropolymers. See our wet stripping systems.
  • Micro-abrasion: A controlled abrasive stream selectively removes coating, ideal for local rework and for coatings resistant to solvents such as Parylene. See our micro-abrasion systems.
  • Thermal Removal: Involves controlled heating to soften or volatilise certain coatings. Typically limited due to risk of component damage.
  • Mechanical Tools: Scalpels, scrapers, or rotary tools used in manual repair. Useful for small, localised areas but operator-dependent.

Key Considerations for Safe Removal

  • Match the removal method to coating type (e.g., acrylic vs Parylene).
  • Ensure operators follow IPC-7711/7721 rework standards.
  • Maintain ESD-safe conditions during the entire removal process.
  • Inspect after removal for residue, pad integrity, and readiness for recoat.

Summary

Conformal coating removal may be performed locally or across the entire PCB, depending on repair needs. With methods including chemical stripping, micro-abrasion, and thermal approaches, engineers can safely prepare boards for rework or re-coating while protecting assembly reliability.

Why Choose SCH Services?

Partnering with SCH Services means more than just outsourcing — you gain a complete, integrated platform for
Conformal Coating, Parylene & ProShieldESD Solutions, alongside equipment, materials, and training, all backed by decades of hands-on expertise.

  • ✈️ 25+ Years of Expertise – Specialists in coating technologies trusted worldwide.
  • 🛠️ End-to-End Support – Guidance on coating selection, Parylene grades, masking, inspection, and ProShieldESD integration.
  • 📈 Scalable Solutions – From prototype batches to high-volume production, SCH grows with your needs.
  • 🌍 Global Reach – Responsive support across Europe, North America, and Asia.
  • ✅ Proven Reliability – Built on quality, consistency, and customer satisfaction.

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✉ Email: sales@schservices.com
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