Abstract: The instant invention is an electrolyte additive for use with lead acid batteries containing antimony. The electrolyte additive consists of a mixture of natural oil such as white mineral oil or a hydro cracked and treated oil with naphthenic oil, a zinc free rust and oxidation inhibitor and an ethylene-propylene copolymer. The electrolyte additive is placed above the plate cells in lead acid batteries having antimony to inhibit gassing and misting with an ancillary benefit of increasing performance and durability of the battery.

Abstract: The instant invention is an electrolyte additive for use with lead acid batteries containing antimony. The electrolyte additive consists of a mixture of synthetic oil, naphthenic oil, zinc free rust and oxidation inhibitor and an ethylene-propylene copolymer. So as to allow for faster mixing of the material an anti-foaming agent may be added and the additive is receptive to the addition of dye allowing the consumer to distinguish the additive from a sulfuric acid solution. The electrolyte additive is placed above the plate cells in lead acid batteries having antimony to inhibit gassing and misting with an ancillary benefit of increasing performance and durability of the battery.