The Cortec ElectriCorr VpCI-238 is an electrical cleaner/protector that can be sprayed on vehicle battery terminals to protect them from corrosion buildup that would otherwise interfere with battery operation. A thin film provides instant corrosion protection and does not alter the electrical resistance or magnetic properties of metal substrates. It effectively inhibits galvanic corrosion for metals and alloys such as aluminum, copper, ferrous and other non-ferrous metals. Apply to battery terminals after the vehicle has cooled and all battery contacts are in place.