Permatex® Dielectric Grease 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. Necessary for an effective tune-up on high energy, ignition-equipped vehicles. Use on battery terminals, switches, distributor caps, light sockets, spark plug boots, coil connectors, electrical connections, and fuses. Protects Electrical Connectors from Corrosion Prevents Spark Plug & Boot Damage Use on Bulbs, Lamps, Electrical Connectors OEM Specified Lubricants