Dielectric grease is designed to protect electrical connections against contaminants such as dust, salt and moisture. It is most often used on cars and motorcycles, where it can ensure that the spark plugs get an uninterrupted flow of current and that external electrical systems (such as headlights) don't get fouled by grit tossed up from the road. As a lubricant, it also makes it easier for these parts to be disconnected and maintained. Applying a coat of dielectric grease to seal a connection is a simple and quick process.
- Skill level:
Things you need
- Battery cleaner
- Wire brush
Shut down the vehicle and remove the key from the ignition to ensure that there isn't power flowing through the ignition system. If you are using dielectric grease on a household electrical connection, shut off the power to the circuit by flipping the relevant circuit breaker to "Off" on the breaker panel for the building.
Disconnect the two parts whose connection you wish to grease.
Wipe off any dirt or grease with a rag.
Use battery cleaner to clean any battery contacts being greased. This cleaner is a liquid solvent you spray onto the contacts of the battery, then wipe away with a rag. You can also use a small, stiff wire brush to clean dirt from the metal surfaces that carry electrical current.
Spread a thin layer of dielectric grease over both pieces being connected using a soft rag. Do not use a thick layer of grease because the metal conductors need to make contact with each other.
Reconnect the parts. The dielectric grease will coat the connectors and keep dirt and grit out of them. If you notice any problems with the connection after greasing, wipe them clean and repeat the process with less grease.
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