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Dielectric Grease

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DavidRP

03-30-2001 06:54:23

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Dielectric Grease is used to prevent corrision on all types of electrical connections...does this stuff really work or will any type grease work?

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Nomechanic

03-31-2001 07:48:35

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Re: Dielectric Grease in reply to DavidRP, 03-30-2001 06:54:23

Is that the stuff used in light bulb sockets on cars?

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Tyler(WA)

03-30-2001 08:04:11

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Re: Dielectric Grease in reply to DavidRP, 03-30-2001 06:54:23

Dielectric grease is an electrical grade of grease meant to prevent oxidation by sealing out air while not conducting electrical current itself.

Few grease products conduct as it is and the added value of the dielectric component of the grease is marginal. They are superior at sealing out air and don't dry out like petroleum products can so I use them for that reason alone.

You can use what ever you have but if you have dielectric grease, you will be happy with its performance.

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Nobul

04-01-2001 07:21:59

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Re: Re: Dielectric Grease in reply to Tyler(WA), 03-30-2001 08:04:11

OK, now if I am putting this on a battery terminal do I put it directly on the post and clamp over it, or put the clamp on first then apply the grease over the whole thing?

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Dean

04-01-2001 12:51:27

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Re: Re: Re: Dielectric Grease in reply to Nobul, 04-01-2001 07:21:59

Never apply grease of any kind to a battery terminal. All it does is collect dirt and cause the battery to discharge across the top of the battery where the grease/dirt build up. Keep the terminals and top of the battery clean. Baking soda and warm water and an old toothbrush are all you need. Remove the cables once a year, shine the terminals and posts up with a wire brush or Scotchbrite pad and put everything back together.

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Tyler(WA) Oooops! One more point....

03-30-2001 08:11:52

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Re: Re: Dielectric Grease in reply to Tyler(WA), 03-30-2001 08:04:11

Some lubricating grease products contain graphite and THEY WILL CONDUCT. Don't use them if you don't want electrical current flow through the joint.

HOWEVER - most use of grease on electrical conections is for corrosion control and NOT to prevent conduction. Battery posts are certainly not helped by the non conducting nature of grease but they are helped by the sealing quality.

If you are applying grease for corrosion control in a MULTI CONDUCTOR plug, you certainly wouldn't want to short out the conductors with a conductive grease. Use dielectric grease here.

If you are greasing up a battery terminal to prevent corrosion, dielectric grease is good stuff but not necessary.

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Dean

03-30-2001 08:56:52

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Re: Re: Re: Dielectric Grease in reply to Tyler(WA) Oooops! One more point...., 03-30-2001 08:11:52

Not a good idea to substitute. If silicone dielectric grease is specified you MUST use it. GM HEI distributors (some models) are an excellent example. It has special thermal conduction properties that make it the only grease that can be used for that purpose. Failure to do so results in a very expensive repair.

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Tyler(WA) Right on...

03-30-2001 12:19:51

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Re: Re: Re: Re: Dielectric Grease in reply to Dean, 03-30-2001 08:56:52

When a special silicon or dielectric grease is called for, use that ONLY.

My recomendation for using whatever you have is reserved strictly for such demanding applications as battery posts, exposed coil terminals and other "not so fussy" things.

Thanks Dean

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