When should you not use dielectric grease?
Christopher Ramos
Updated on April 12, 2026
See all 4 photos Since it's a low-viscosity grease, many experts advise not to use dielectric grease in high-temperature components that will see in excess of 500 degrees Fahrenheit.
Should I use dielectric grease?
Most commonly applied on spark plug boots, lightbulbs, and battery terminals, dielectric grease is, in theory, a protectant like car wax. It's not required, but it could help extend and maintain the life and quality of your vehicle and its parts.Can dielectric grease cause problems?
Though it works well for this purpose, it can sometimes cause a connection to stop working if not all of the grease is pushed out of the way between the points of contact inside the connector. Additionally, it is often used to lubricate other engine-related parts, like rotors, distributor caps, and speedometer cables.Is dielectric grease safe for electronics?
Since dielectric grease is a silicone grease, it should not be used on silicone-based rubbers or plastics, as it will break them down over time. The grease does not conduct electricity, so it shouldn't be applied directly to the mating surfaces (pins and sockets) of an electrical connection.Is it OK to put dielectric grease on battery terminals?
The best and the most recommended grease to put on battery terminals to protect them from corrosion is silicone dielectric grease. Dielectric grease prevents acid vapors and water from getting inside contacts making them corrode.How Not to use Dielectric grease!
What can you use dielectric grease on?
Dielectric grease is used in many applications, including high-energy ignition systems, bulb sockets, trailer electrical connectors, headlamp connectors, ignition coil connectors, battery terminals, and spark plug boots. This silicone-based grease is used in battery terminals to prevent corrosion and fusing.Should I use dielectric grease on grounds?
It will work well to help with a ground connection on a frame as well. I would grind the frame to bare metal, put a little dielectric grease on the spot where the ground is, and secure the ground. After that, I would wipe down the excess grease and spray over it with undercoating.What is the best grease for electrical connections?
Silicone grease can be used on all your electrical connections and on battery terminals. They are widely used on spark plug cable rubber boots as well as a sealant for spark plug threads. They also help prevent electrical failures caused by moisture and corrosion.Is dielectric grease just Vaseline?
Meaning of Dielectric Grease and VaselineDielectric grease refers to a translucent substance that is mainly used to seal and protect electrical conductors against sand, dirt, dust, or other foreign materials. Vaseline, on the other hand, is a term used to refer to petroleum jelly.
Should you put dielectric grease on ignition coils?
Dielectric grease should be applied to keep the spark from your ignition coil, which is supposed to go through the spark plugs, from arching around. It also prevents it from going through the boot to the ground.Can you put too much dielectric grease?
While dielectric grease is great for use on electric plugs because it does not conduct electricity and it provides a water-tight seal, too much of it is not very necessary. In fact, if you apply dielectric grease to the extent where it becomes thick and goopy, your vehicle will most likely not start.Is dielectric grease good for stabilizers?
The Best Stabilizer LubricantsOther thick lubricants include dielectric grease, silicone grease, lithium grease, and Extreme Fluoro by Finish Line (Amazon), but they will all work well for your stabilizers. Most of these are cheap and widely available in hardware stores such as Home Depot or Lowes.