Thermoil’s Battery De-Mister is a battery oil additive for nonsealed lead acid batteries. After using the additive and charging the battery, the hydrogen and oxygen gases migrating to the surface are slowed by the oil to help contain acid mist and fumes generated in the charging process, keeping the battery’s top free of acid deposits to help eliminate post and cable corrosion while reducing current leakage across the battery cover; the additive also helps reduce water consumption, toxic fumes and the risk of explosion.