Gel coatings are designed for applications that require avoiding sensitive keep-out areas, as well as being used to seal connectors to block entry of the coating material. Gel coatings can be applied as thick as 1mm, nearly ten times larger than standard conformal coatings. They work well using a dam and fill coating technique, in which a dam of gel product is deposited around the chosen substrate before filling the inner part with a standard conformal coating.

Ellsworth Adhesives supply gel coatings by Humiseal.