View Poll Results: Better over all in a salt water motor, Dielectric grease or Anti-Seize Lubricant?

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  • Dielectric Grease

    0 0%
  • Anti-Seize Lubricant

    3 100.00%
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  1. #1
    Seaman Apprentice
    Join Date
    Apr 2008
    Austin, TX

    Default Which is best, Dielectric or Anti-seize

    Hello all,
    I’m putting my Suzuki df140 lower unit back together. I asked the boat shop guy to order me some Anti-Seize Lubricant so that my screws will not corrode or rust in the future (salt water boat). The Shop guy said “Oh you mean dielectric grease…sure.” He stated it was the same thing. So, I went to my local Autozone and looked at both dielectric and anti-seize products and both seem to do the same as far as corrosion is concerned. Although the dielectric grease package did say protects against moisture, salt, dirt and corrosion.
    So my question to you motor pros is. Which is better to use overall on my Suzuki df140?

    Dielectric or Anti-Seize

    Thanks in advance.

  2. #2
    Petty Officer 2nd Class
    Join Date
    Oct 2007

    Default Re: Which is best, Dielectric or Anti-seize

    I am not an outboard mechanic but the company I work for manufactures commercial fishing equipment for worldwide applications.
    We use a lot of aluminum and anywhere we use fastners that don't require a thread locker like Loctite we use what the boys in the shop lovingly refer to as "mung" or more technically Mobil “Gear Lube 375 NC-- Open Gear Lubricant."
    I'm sure there is more then one manufacturer but we happen to use Mobil. They spray it in a can and use an acid brush to apply to the threads. This stuff is good.
    We get equipment back for repair after years of use in a salt water environment and are still able to take it it apart. (most of the time)
    We also use it as a barrier anywhere we have disimilar metals contacting each other like stainless and aluminun
    That's my go to juice.
    If you ever watch Most Dangerous Catch you'll see our equipment in use.

  3. #3
    Petty Officer 2nd Class
    Join Date
    Oct 2007

    Default Re: Which is best, Dielectric or Anti-seize

    To continue, I thought dielectric stuff was used on electrical connectors, plugs, nav light sockets, etc.

  4. #4
    Petty Officer 1st Class
    Join Date
    Dec 2008
    Soda Springs, Id

    Default Re: Which is best, Dielectric or Anti-seize

    Never had to deal w/ salt water environment, but I've always used antiseize on any bolt/nuts that may be sujected to water or corrosion and dissimilar metals. Hasn't failed me yet.
    I don't know how dielectric grease will work in an electrolysis environment.
    Ol' Stonebreaker

  5. #5
    Lieutenant Commander Mas's Avatar
    Join Date
    Oct 2006

    Default Re: Which is best, Dielectric or Anti-seize

    Well, a dielectric connector in the plumbing world is a connector that isolates dissimilar metals, such as copper and galvanized steel, so they do not contact each other and induce galvanic action. So, I would infer that dielectric grease is used to reduce contact between dissimilar metals.

    Not an expert in grease, I'm just thinking aloud.


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