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Thread: Cistern masonry repair/resealing

  1. #1

    Default Cistern masonry repair/resealing

    I have a pair of brick cisterns & they seem to be leaking. I can fill them to the top but they bleed back down & lose about a foot of water level. This leads me to the obvious conclusion that there are some bad masonry joints at that level. Question is, is there any type of spray-on sealant which I could get in there & apply after draining the cistern or should I just resign myself to the fact that I need to get down in there & do it the hard way & pack some hydro seal mortar into the joints? Anyone ever deal with a similar situation?

  2. #2
    Moderator & Master Plumber hj's Avatar
    Join Date
    Aug 2004
    Cave Creek, Arizona

    Default cisterns

    Are these water storage cisterns? If so you may have to tuckpoint or mortar coat them with a trowel

  3. #3


    Yes, they are rainwater storage.


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