Permatex Dielectric Tune-Up Grease, Necessary For An Effective Tune-Up On High Energy, Ignition-Equipped Vehicles. Protects Electrical Connections, Ignition Parts, And Wiring From Moisture, Salt, Dirt And Corrosion. Required Protection In Spark Plug Or Spark Plug Wire Replacement On All Modern Vehicles. Permatex, Made For The Professional. Made In U.S.A. Prevents Spark Plug Boot Damage. Stops Corrosion On Electrical Connectors. Oem Specified High Performance.