PCB potting is a process where a printed circuit board or electronic component is immersed or coated with a protective material, usually a liquid or gel-like substance called potting compound. Depending on applications, there are three commonly used materials: epoxy, polyurethane and silicone.
Conformal coatings are typically applied at a thickness of 25-250 micrometers and common materials for this coating include acrylics, silicones, urethanes, and epoxies. While potting materials are typically applied at a thickness of 1-10 millimeters.
conformal coating and potting
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