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Thread: Gooping Components

  1. #1
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    Gooping Components

    I'm recapping a crossover network in a 23 year old Klipsch speaker (Epic CF-4). The components are all gooped in place with some clear goop, I assume for reliability and to stop any vibration of the components. I was able to remove the goop fairly easily from the non polarized caps. I'm wondering what is the goop, and is it available or is there a good substitute? I'm afraid to use silicon sealant because the acetic acid may do damage.

  2. #2
    Supporting Member Jazz P Bass's Avatar
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    Touch the goop with a soldering iron.

    If it melts, then it's hot melt glue.

  3. #3
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    The acid released when silicone cures can cause a fair bit of damage, but it depends on quite a number of factors; how much you use, time left after curing, whether the circuit is enclosed, humidity etc.

    I built an electric fence energiser that I sealed around the ABS box and secured a few components with it. Not an excessive amount, but after just a short while the whole thing was destroyed through corrosion. The curing silicone had created a corrosive micro-climate that kept on eating away at the component legs and circuit board.

    So I'm now careful where I use it. There are some non-acid curing alternatives and these are fine, though the last stuff I bought cured solid right through the tube after opening and I've not had that with regular silicone.

    I use hot-melt on stuff that runs cool, but silicone is still the stuff for hot conditions.

  4. #4
    Old Timer J M Fahey's Avatar
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    There is non acid silicone sealant , so search for it.

    Or google "conformal coatings" which is the actual Electronics Industry approved product.
    Maybe not available *everywhere* but you should be able to mail order some.

    If in a mid/large city, check some large Industrial Electricity shop, the kind which sells wrist sized electrical cable, they usually have some kind of 3M stuff to seal such cable splices.
    Juan Manuel Fahey

  5. #5
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    Thanks everyone for their ideas.

  6. #6
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    Quote Originally Posted by Jazz P Bass View Post
    Touch the goop with a soldering iron.

    If it melts, then it's hot melt glue.
    Thanks Jazz P Bass, the hot iron showed it was hot melt glue.
    Maybe I need to buy a hot glue gun.

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