Battery terminal coating is a specialized product used to protect a battery's terminals from corrosion and damage. It is typically applied as a spray or brush-on product to form a protective barrier around the battery terminals. The coating is typically composed of a specialized formula that is resistant to moisture and acid, both of which are common causes of battery terminal corrosion. In general, using battery terminal coating is simple and straightforward. The battery terminals should be thoroughly cleaned and dried before applying the coating.