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  1. #1

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    Dual Field coil protectant

    My Dual Field has had Two coils replaced. It is not even three years old. Now warranty has expired. I was told that pin holes can develop in the Epoxy which holds the top and bottom coils when it is used in a salty environment, causing water to penetrate the coil causing it to fail. Isn't this designed to be used in or around salt water? Flex Seal comes to mind. Has anyone dipped the coil into liquid "Flex Seal" or sprayed "Flex Seal Aerosol" onto the coil to give it added protection. I have always had a coil cover on it but it doesn't cover the Epoxy layer. If it should fail again, I won't be sending it in for repair

  2. #2
    rchalker's Avatar
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    Well so far I have seen people using Plasti Dip, and the latest thing was liner coat. The liner coating is really tough stuff. Plasti Dip is not tough at all.
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  3. #3

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    Thanks for the tip! That should make it Bomb Proof

  4. #4
    rchalker's Avatar
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    That's probably the truth too. My friend used this stuff to coat all the handles of his tools and it is really strong. We work on live electrical wires all the time. This stuff works great on tools like pliers and to coat screw driver shafts.
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  5. #5
    deolslyfox's Avatar
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    As to your original comment .... I have seen some BHID coils that had water intrusion around the coil connector, but I haven't run across the instance where salt water damaged the epoxy on my or other beach machines I have seen some that are used so hard that the sand has literally eroded the coil, but again, I don't know if I'd give a lot of credence to the "salt water damaging the epoxy" theory. But, I guess anything's possible.

    FWIW: When I'm done with a beach hunt I always give my detector a fresh water rinse / wipe down.
    If there's anything I hate worse than diggin' pulltabs, its missin' a gold ring.

  6. #6

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    In regards to the coil connector, do you apply silicone at the point where the wire comes through the coil. Is this something I should do periodically? I'm not taking any chances so only knee deep in the water. It's too bad that the battery compartment wasn't the same as the BHID. That looks like a much better design.

  7. #7
    deolslyfox's Avatar
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    I don't. However, I don't guess it would hurt anything ....
    If there's anything I hate worse than diggin' pulltabs, its missin' a gold ring.

  8. #8
    rchalker's Avatar
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    I don't put any on mine and never have had a leak. I do check to make sure they are tight. I had one loosen up on me once.
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  9. #9

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    Rodney,
    What part loosened up?

  10. #10
    deolslyfox's Avatar
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    Quote Originally Posted by tom from mass View Post
    Rodney,
    What part loosened up?
    Tom: There's a screw on connection at the coil. You want to make sure it stays tight ....
    If there's anything I hate worse than diggin' pulltabs, its missin' a gold ring.

  11. #11

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    keep in mind the plasti dip is much easier to remove from coil if you need to send it in than something like truck bed liner. I use plasti dip for this reason

  12. #12
    rchalker's Avatar
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    Like Fox said.
    Click image for larger version. 

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  13. #13

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    Wow! Thanks for that info. That is probably the reason for water intrusion

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