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Thread: Silicone vs butyl tape for light cord conduit leak. Can butyl tape be used underwater

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    Join Date
    Mar 2015
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    San Antonio, TX
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    Silicone vs butyl tape for light cord conduit leak. Can butyl tape be used underwater

    Just went through a pool resurface and upgraded lights to led. The conduit is from the 80's and probably has a pinhole somewhere. Is it necessary to drain the pool to apply the butyl tape? If I do drain the pool is silicone an acceptable sealant for pools? Will the chemicals degrade it over time. I've read about underwater epoxy on the forums. Will that stuff really stick to surfaces underwater. It seems like I could get the silicone farther up the old conduit to seal it up.

    Thanks,
    Rob
    30,000 Gallon geometric 40'x20' French Gray Quartzscape, 3hp Pentair VS Intelliflo ,Pentair Racer, 400K Pentair heater, Pentair 520sqft Cartridge filter, EasyTouch 8, Intellibright 5G

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    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
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    37,879

    Re: Silicone vs butyl tape for light cord conduit leak. Can butyl tape be used underw

    Underwater epoxy is the only think likely to stop a leak for more than a short while.

    You don't want anything "further up the old conduit". You want to leave subsequent repairs some chance of removing the epoxy/tape in case the fixture ever needs to be replaced.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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