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Selective conformal coating has become the preferred method for protecting sensitive areas on modern PCBA assemblies while leaving connectors, test points, and heat sinks uncoated for functionality.

Controlling conformal coating thickness is one of the most critical yet often overlooked steps in PCBA protection. A coating that is too thin leaves vulnerable spots where moisture, dust, or contaminants can penetrate, while a coating that is too thick can trap heat, cause stress cracks during thermal cycling, and interfere with component functionality.

Insulation coating spraying is a critical step to prevent electrical shorts, leakage currents, and arc tracking on PCBA assemblies operating in tight enclosures or high-voltage environments.