What is Dielectric Grease (Application and How to Use It)

When electrical components are placed together, there is a chance that an arc will form (which means that electricity will jump from one element to the other). To prevent this, dielectric grease is used. 

Many people are confused about the difference between grease and dielectric grease. When to use dielectric grease? Is it similar to silicon grease? These are the question people usually ask us.

Also known as tone-up grease, the dielectric grease is silicon grease with non-conductive properties. It protects electrical terminals from corrosion, dirt, and moisture. It is applied to rubber parts of the connectors because it can disrupt the current. This article will tell you about the dielectric grease application, its uses, and how you can use it.

How to Use Dielectric Grease:

Dielectric grease is created when a thickener is added to silicon. Before using dielectric grease, make sure you know it’s an insulator. Apply it on the outside cover of electrical components and never apply it on any electrical circuit or path from where the current has to pass because it will disrupt the current flow due to its non-conductive properties.

When using it for automotive tuning on an engine, apply dielectric grease at the rubber boot of the spark plug and swell it a bit to coat the inner lip. With this, the current will not flow out from the engine, and the plug will be protected from water and dust.

Dielectric Grease Applications:

There are many things where dielectric grease is used, such as spark plug boots, bulb sockets, ignition systems, headlamp connectors, electrical connectors, battery terminals, and many more.

  •  Dielectric grease is applied on battery terminals to prevent fusion and corrosion.
  • In ignition systems, dielectric grease prevents voltage leaks. It is applied to electrical connectors to work as a sealer.
  • It is also used in spark plug boots and other connectors with high voltage. The spark plugs have to bear high temperatures, and dielectric grease, due to heat resistance, helps a lot.
  •  Another application of dielectric grease is its use on gasket covering the multi-pin connectors in automobiles. The goal is to seal the rubber part of the connectors.

Difference Between Dielectric and Regular Grease:

  • There is a vast difference between regular grease and dielectric grease from their application to physical properties. Standard grease can not be used at a high temperature because of its low melting point. But dielectric grease can be used on components that get overheated because it is heat resistant.
  • Dielectric grease is more expensive between the two. But it’s worth the cost because it does not dissolve in liquids like regular grease, so it is perfect for marine and out-of-doors usage.
  • It has a better lubricating effect than regular grease.
  • Regular grease is a conductor, while dielectric grease is a non-conductor.

Pros of Dielectric Grease:

  • If metal surfaces of electrical systems are coated with dielectric grease, they will be protected from corrosion. The system will also be able to resist more heat.
  • It protects plastic and rubber parts like computers chips and other electrical systems from fire and other damages.
  • It provides insulation for electrical circuits.

Cons of Dielectric Grease:

  • If applied incorrectly, it will disrupt the current path and stop it from flowing.
  • It can affect skin and eyes if gloves and glasses are not used.
  • When it melts, it can affect the respiratory system.