3 Best Dielectric Grease Reviews and Complete Guide 2020

Dielectric grease is a must-take chemical formula both for DIY users for a certain application and professionals for a wide range of applications. But the crucial task is to find the best dielectric grease that is versatile and high quality.

You will come across dielectric grease substitute in the auto parts store but they may not work great as high voltage electric contact grease. Our suggestion is to be after the right product that will serve several purposes- sealing against corrosion, water resistance, heat and high voltage resistance, and insulating dirt, salt, and dust.

For this, you must know how to single out the best from the good. This is where our article will prove instrumental for you.

Permatex 22058 Dielectric...
CRC Dielectric Grease...
Dielectric Grease /...
Permatex 22058 Dielectric...
CRC Dielectric Grease...
Dielectric Grease /...
Permatex 22058 Dielectric...
Permatex 22058 Dielectric...
CRC Dielectric Grease...
CRC Dielectric Grease...
Dielectric Grease /...
Dielectric Grease /...

The Best Dielectric Grease

01.Permatex 22058 Dielectric Grease Tube for Tune-Up

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The quality of a product is evident from the trust and reputation the manufacturer has built over time. Therefore, we will suggest Permatex dielectric tune-up to be the best even before going in-depth on the features and benefits of Permatex Dielectric grease.

To your utter comfort, Permatex has earned the prestige of the leading manufacturer of the top quality chemical products by being always on the right job and promise. And Dielectric 22058 model is their signature product that you can trust on for extreme sealant and protection against corrosion.

On top of a premium grade sealant, it offers to serve as the efficient lubricators for the spark plug, plastic boots and gaskets used in electric mating points. Furthermore, this dielectric lube works magic in a wide range of applications that include automotive, marine, motorbikes, trailer hitches and other heavy-duty hardware.

And Permatex stands out in the stack because it will not break your bank or go too deeper into your pockets. In a sense, this is a high-end solution at an affordable cost.


  • High-end sealant formula at low price
  • Recommended for the high voltage ignition system
  • Ensures max conduct area by preventing voltage leakage
  • A versatile formula against bad conductor build-up anywhere
  • Works magic to protect rubber and plastic components

Bottom-line: Permatex dielectric grease extends the life of battery terminals, bulb sockets, spark plug rubber boots, rubber gaskets, and more.

02.CRC Opaque White Di-Electric Grease

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CRC dielectric grease featured with a thinner and non-curing silicone formula. That works great as a sealant, lubricant, water-resistant, and an insulator. Therefore, it will keep the highly conductive attribute of your application intact even in rough weather and the aquatic environment.

If coated with this dielectric grease, electrical contact points that exchange charge remain highly conductive even in rainy, foggy, and extremely temperate condition.

CRC opaque white grease is strong enough not to melt even in extreme heat and so any electrical contact point doesn’t grow adhesive build-up to cause voltage reduction. Thus it is very effective in extending the battery life and compensate for the high-end price.

You can reap all the benefits covered above for a wide range of applications including electrical panels, scoreboards, traffic and other outdoor lightings, high energy poles, transformers, spark plugs, battery terminals, o-rings, and fasteners.


  • Waterproof and leak-proof current flow
  • Works great for rubber and plastic lubricator
  • Can withstand extreme temperature ranging from 70-400° F
  • Remain highly active in adverse weather

Bottom-line: Excellent sealing and high-end quality compensate for the high price. 

03.Mission Automotive Waterproof Dielectric Grease

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Mission dielectric compound is an industry leader by virtue of its top quality sealing and protection against corrosion along with adhesives like salt, water, and dirt. Moreover, it can stay non-melting and immobile even if heated by as high as 55-570° F. and so used by the car owners to be the best battery terminal cleaner.

Aren’t these enough to go for this without thinking twice?

To talk of the wide applications, you may include automotive, marine, electrical, and more uses. And the materials it works magic on are rubber, metal, and plastic. To add, this corrosive-resistant and waterproof grease are thick enough to prevent voltage drop at electrical connections. Because it will keep the contact area free of the non-conductive build-up to let larger contact space to pass more current and reduced resistance.

To stand out among the crowd, Mission offers a brush to apply the formula just where you need saving the connecting points. The applicator brush is bent a bit to reach the tricky necks of jar edges.


  • Premium quality and industry-grade dielectric grease
  • Resistant to high temperature, water, and oxidation
  • Wide range of uses
  • Applicator brush to reach max area
  • Affordable price

Bottom-line: Top quality, Innovative and versatile sealing compound at affordable price.

What is dielectric grease?

Dielectric grease is a non-conductive tune-up grease to keep moistures, dirt, and other particles away and thus how prevents corrosion building up on electrical connections. Though it is used as the best lubricant for rubber seals to save rubber and plastic surface from decaying, it works great in metal parts to bar foreign particles like salt, water, and acid fumes from settling there.

What deserves special mention is its application as dielectric grease spark plug thanks to its lubing and anti-corrosive nature. As it withstands extreme temperature and does not melt, metal points where electricity passes through finds it too convenient. 

On the flip side, dielectric grease is harmful to any substance that is based on silicone. Therefore, even plastic and rubber objects having silicone touch in their making process should avoid dielectric grease.

How to apply dielectric grease?

We better know that dielectric greases are non-conductive that prevent electrical connections to pass current. Therefore, we should take care when using this silicone-based grease on electrical contact points as best battery terminal cleaner spot like a spark plug.

Whatever the spot to apply we have two options to put grease on the spot – with bare hands as well as spraying and applicator brush.

However, you can apply the formula with bare hand but you have to wipe the grease dropped on junctures and points pass high voltage electricity. A rag will be of great help here. We can use dielectric grease spray that too needs wiping off grease from the sensitive spot.

And as a better alternative, use the applicator brush to apply where and how much you need. These brushes can reach the crevices and notches of the intended applications.

Dielectric grease vs Vaseline

There runs confusion among the users with the three most popular fluids – dielectric grease, Vaseline, and silicone grease. While these three share several common attributes and activities, they do have significant differences. Therefore, to eliminate the confusion and avoid the wrong use of the crucial liquid, we have attempted to make things clearer. 

Dielectric Grease

Dielectric grease is a non-conductive and extreme-heat resistant chemical compound formulated to fight corrosion build-up on or around electrical junctures, save rubber and plastic from adhesive particles, and to seal salt, water, and dirt from setting on machine parts.


Vaseline is petroleum jelly popularly known for home use but also works great as lubricator and insulator against dirt, salt, and other adhesives.  Vaseline is not heat-resistant and a conductor though not a good one. Vaseline is used to lubricate plasticizes, coating wood, condition leather, and other industrial use.

Differences between Dielectric Grease and Vaseline

Meaning: Dielectric grease refers to a thick liquid that does not conduct electricity and does not melt while faced with high voltage and heat. It doesn’t burn as well. Conversely, Vaseline is a term referred to petroleum jelly.

Strength: These two differ in strength to a large extent. Dielectric grease is strong enough to preserve the intended surface against extreme heat and high voltage. On the contrary, Vaseline would not last long while fighting high temperature and burn or run after a short while.

Chemical Properties: Dielectric greases are not an electric conductor and show extreme stability while faced with high voltage current. They are known as high voltage electric contact grease.

 The difference in Cost: Being a high-end anti-corrosive and sealant against adhesive particles, dielectric greases sell at comparatively high prices. But petroleum jelly is a cheaper but not a suitable alternative.

You may get even clearer about the difference from a chart showing the subtle dissimilarity minutely.

How to pick the best dielectric grease?

It is practical for you to depend on the brand value and the trust created by the manufacturer while buying dielectric greases. To make it clearer, if you want to reach a quality and efficient anti-corrosive grease; you have to gather knowledge on the big names in the industry that manufacture dielectric grease. This will take time but you can conduct online research.

For a better alternative, you can either go by the reputation of the big brand or you have to browse across the customer reviews in case of buying a lesser known product. You should go for a newcomer in the market only if that is backed by positive customer reviews.

The third and final way is to go by the advice of the professionals and expert in this connection. By this consideration, you can pick any one of the three products that will serve your purpose best as they are the expert preferences.

How to use Dielectric Grease on Electrical Connections in Your Car


Q: Do you need dielectric grease?

Yes, I do need one to protect corrosion by using dielectric grease on battery terminals of my car. I also need it to protect my spark plug against all contamination and keep the rubber free from corrosion.

Q: Is dielectric grease conductive or nonconductive?

Dielectric grease is out and out a nonconductive chemical formula. If you smear it on or around electrical connections in any application, it will act as an efficient sealant and insulator against corrosion and melting.

Q: Is silicone dielectric grease? 

Silicone grease too can be called dielectric grease in the sense that like dielectric grease silicone grease also is non-conductive, heat resistant, and do not dissolve in water. But they differ widely in terms of meaning, cost, and chemical properties.

Q: Can you put dielectric grease on battery terminals?

Yes, I can put. Rather I should put dielectric grease on battery terminals given they are anti-corrosive, heat resistant, and do not run while heated high.

But one should also know that dielectric grease applied on battery terminals settles there over time. And that causes voltage harming the battery life.

Q: Does Dielectric grease improve connection?

Yes, it improves connection as it contributes to keeping particles away that are responsible for corrosion. It keeps the rubber and plastic used beneath or near electric connections lubricated and free from decay.


Having all the crucial factors covered in-depth, this article has equipped you with the full knowledge to find the right product. And the three product descriptions are enough to make understand that you can avail the superior quality dielectric grease at affordable price.

So go for the best dielectric grease among the three industry leaders reviewed here.

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