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Thread: Coping mastic/caulk cracking

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    Coping mastic/caulk cracking

    Hi, we bought a home with an existing pool in March. I've finally got the pool dialed in with BBB and my TF 100. We had noticed an odor that we thought was the water. We found out the odor is coming from the area where there was water penetration and likely mold where the mastic has holes. I tried posting a pic from my iPad but the file size is too big. Cracks range about 1 to 3 inches in length and less than 1/4 in in width.

    I sprayed a bleach solution in the cracks.

    Are these considered minor? Should I replace the mastic/caulk? If so what is the best product?

    New pool owner 3/2013 14,000 gal pebble tec, 7 ft jacuzzi with spillover into pool.
    FNS +48 DE filter, raypak2100 heater, Pentair whisper flo 1.5, Hayward pool cleaner. TF 100 test kit.

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    In the Industry
    duraleigh's Avatar
    Join Date
    Apr 2007
    Sebring, Florida

    Re: Coping mastic/caulk cracking

    Yep, caulk 'em.

    Polyurthane caulk is the most durable but a little hard to work with. You'll get the best job if you mask off the joints and then smooth them out with a putty knife.
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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