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Thread: Best Caulk for Pool Area?

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    Join Date
    Jan 2016
    Conroe, TX

    Best Caulk for Pool Area?

    One of many dumb questions to expect from me...

    My 14,000 gal. in-ground pool is surrounded by a stone tile border which is then edged with a large area of concrete/pebble-paving.

    The joint where the pool border meets the concrete pebble paving seems to be opening up due to (I guess) some settling (the pool was installed in 2004 when the house was new).

    For this area that sees lots of water splash, is there a "best" type of caulk to fill that gap with? It's about 1/2" wide now where it was probably about 1/4" by design when built. I would suppose that whatever is used should be a flexible material but should stand up to long-term water, sun, and movement during temperature and underneath soil saturation changes as the seasons go by.


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    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    DFW, TX

    Re: Best Caulk for Pool Area?

    Yes, pool decks move at different rates than pools do. One well known brand is deck-o-seal.
    TFP Moderator
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    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

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    duraleigh's Avatar
    Join Date
    Apr 2007
    Sebring, Florida

    Re: Best Caulk for Pool Area?

    1/2" is a wide gap for caulk. You may need some backer rod for filler. Lowes and HD both have it.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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