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What Is Dielectric Grease – Purposes & How To Use It

Should you go to any auto store, dielectric grease is a product that you’re certain to see. What’s dielectric grease and why do all mechanics use it?

On this information, we contact on the fundamentals of dielectric grease. We consider the professionals and cons of the lubricant, plus we present you when and the way to use it. Plus, we decide the variations between two standard automotive grease varieties. 

What’s Dielectric Grease?

Typically, dielectric grease is known as tune-up grease due to the way it’s utilized in auto retailers. It’s a non-conductive waterproof lubricant that protects electrical elements from grime and corrosion. It’s constructed from a silicone base and an added thickener. 

Permatex makes a dielectric grease that lists each silicon dioxide and polydimethylsiloxane as elements. Should you take a look at the colour of this grease, it ought to seem milky or translucent grey. 

Right here is an instance of Permatex dielectric grease. That is an affiliate hyperlink, which means without charge to you, we could obtain a small fee for qualifying purchases.

Dielectric Grease Professionals

1. Creates Seal

Dielectric grease gives a robust seal for steel surfaces. It may be used on {the electrical} system’s steel elements to forestall corrosion and rust.

This grease holds up beneath excessive temperatures. It would proceed offering a seal, even when temperatures attain 500 levels Fahrenheit.

2. Protects Plastics

Dielectric grease is used to guard each plastic and rubber. When used with numerous pc ships and electrical techniques, it may well cease a fireplace from occurring.

It will possibly additionally scale back the wear and tear of connecting surfaces. With this protecting coating, resistance is minimized and oxidation is prevented. 

3. Insulates 

There’s additionally an insulating property for {the electrical} system. Dielectric grease prevents oxide buildup that might trigger resistance and sign loss.

That is one motive it’s used for multi-pin connectors, to insulate in opposition to any potential brief. It’s additionally useful for speedometer cables and different electronics that should be protected. 

Dielectric Grease Cons

1. Non-Conductive

Whereas dielectric grease is immensely helpful when utilized in the best manner, it may well additionally result in points when misapplied. As a result of the grease is non-conductive, you have to be cautious the place you set it.

When used inappropriately, present circulate may be inhibited. For instance, if you happen to don’t clear up the contact factors on the conductor, you’ll lose the present circulate. 

2. Doubtlessly Hazardous

Over a number of years, dielectric grease can begin to soften silicone rubber. Nonetheless, you shouldn’t apply it to these surfaces within the first place.

Moreover, you will want to put on security glasses and gloves when working with the grease. It’s recognized to annoy the pores and skin and eyes. It will possibly additionally produce formaldehyde at larger temperatures. Should you aren’t getting sufficient air flow, it may result in an irritated respiratory system. 

Dielectric Grease

Dielectric Grease Purposes

1. Battery Terminals

Once you use silicone-based grease on the battery terminals, you possibly can cease corrosion from occurring. Nonetheless, it doesn’t appear logical to place this non-conductive grease on battery terminals. 

Nonetheless, if you happen to put grease on each the clamps and terminals and bolt them securely collectively, the vast majority of the grease squeezes out. What you get is an effective connection that is protected against water and air round it. 

RELATED: Battery Terminal Corrosion Causes (How you can Repair & Stop It)

2. Excessive-Power Ignition System

Dielectric grease can be utilized on ignition coil connectors and different ignition elements. It’s product to forestall voltage leakage from occurring. 

Again within the day, dielectric grease was generally used on distributor caps. It’s one of many causes it grew to become generally known as tune-up grease.

3. Spark Plug Boots

One more reason for this nickname is due to its use with spark plug boots. By making use of grease to the rubber boot, you permit it to slip simply onto the ceramic insulator. 

This software will seal the boot and hold it from getting caught. As a result of spark plugs are topic to excessive temperatures, the grease is a superb possibility. 

4. Electrical Connectors

Dielectric grease is usually used with multi-pin connectors. It’s additionally standard with connectors which have rubber elements. 

As a result of you possibly can spray dielectric grease into tight areas, it’s useful when you’ve spots that don’t suit your fingers. You can too use it with warmth shrink terminals, rings and spades. 

5. Gentle Sockets & Connectors

You possibly can defend your exterior lighting with dielectric grease. It’s frequent to make use of with headlamp connectors and bulb sockets.

When used correctly, it may well prolong the lifetime of the car elements. Simply be certain that the grease doesn’t get on any conductive contacts. 

Dielectric vs. Lubricating Grease

Some individuals use the phrases dielectric and lubricating grease interchangeably, however they’re totally different. For starters, the composition is totally different. Whereas dielectric grease is constructed from a thickener and silicone, the lubricating grease might be product of some kind of lubricating oil, reminiscent of a vegetable, petroleum or artificial oil, a thickener, together with extra components.

There’s additionally a distinction in what functions both can be utilized for. We now have outlined what dielectric grease can be utilized for, however lubricating grease is supposed solely for lubricating functions. It’s generally used with numerous adapters to funnel grease into automobile elements. 

How you can Use Dielectric Grease on a Spark Plug Boot

It’s not troublesome to make use of dielectric grease, particularly when engaged on spark plug boots.

  1. With the car turned off utterly cooled down, take away the spark plug boot.
  2. Clear off the spark plug and the boot.
  3. Squeeze a small quantity of dielectric grease onto some cardboard. A small piece is all that’s wanted.
  4. With a cotton swab, apply a minimal quantity of dielectric grease on the interior wall of the plug boot.
  5. Put the boot again the place it belongs and go for a check drive. 

Should you aren’t certain the way to correctly add dielectric grease to the spark plug boot, you’ll want to go to knowledgeable auto restore store. You possibly can spend as little as $75 for a whole tune-up and save your self the effort of messing one thing up. One small mistake whereas doing a tune-up can price you way more sooner or later.



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