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Thread: Black gunk getting conductive and corrosive

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    Default Black gunk getting conductive and corrosive

    https://www.youtube.com/watch?v=dftkoD7LG0A

    The white stuff - caulk, I think, it is called it probably doesn't?
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    It's called RTV. Or generically "caulk".

    There's different qualities, grades, properties to caulk.

    The one most commonly used in power supplies is 9661E. The black stuff in that video doesn't appear to be much more than "glue".

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    well spill water all over it...there might be a bunch of cig ash all over it and a butt in the mobo..absolutely...maybe that will help lol
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    There was a particular elastomer (silastic, whatever you want to call it) with a bad chemical composition that went bad after a while as it aged.
    Normally, that substance was a dark yellow, mustard like color, but when it went bad and conductive it turns brown.

    From memory, it has something to do with heat, aging, becoming hygroscopic (absorbing humidity from air and becoming conductive) and something chlorine or chlorine related... can't find the documents where it explained the failure mechanism.


    There's plenty of threads on Badcaps.net or forums like this one: https://www.electronicspoint.com/thr...ove-it.280006/

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    Default

    Quote Originally Posted by jonnyGURU View Post
    There's different qualities, grades, properties to caulk.
    Quote Originally Posted by nina27 View Post
    There's different qualities, grades, properties to caulk.
    You're acting like a spammer. First sign of a spam post from you and you're out of here.

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