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  1. #1
    Join Date
    Mar 2014
    Posts
    1

    Default Nothing works against this mold

    I removed the flooring in my house to replace it and I discovered that I have a mold problem on my concrete slab inside my house. I have tried scrubbing it with TSP, bleach, and commercial mold product and nothing works. The mold always grows back a couple days later. Do you have any suggestions that would prevent the mold from growing back? (I know vinegar is another option but I HATE the smell of it so I would like to try another option first) Thanks for your help!

  2. #2
    Join Date
    Jun 2009
    Posts
    315

    Default Re: Nothing works against this mold

    See if you can find this product in your area.
    D/2 Architectural Antimicrobial.
    It is non-toxic no odor.

  3. #3
    Join Date
    Aug 2007
    Posts
    7,096

    Default Re: Nothing works against this mold

    Are you sure it's mold? Is it white fuzz? If so, then it is likely efflorescence, which is the salts in the cement being pushed out by moisture.
    I suffer from CDO ... Its like OCD, but in alphabetical order, LIKE IT SHOULD BE!!!

  4. #4
    Join Date
    May 2008
    Location
    Pacific Northwet
    Posts
    1,631

    Default Re: Nothing works against this mold

    If it IS mold, then you have a moisture problem. You will always have mold until you mitigate the moisture. How you mitigate the moisture -- if you can -- depends on how your slab is installed, the grading around your house, etc. That's going to be hard to diagnose from here.

    If it's efflorescence -- same problem.
    The "Senior Member" designation under my name doesn't mean I know a lot, it just means I talk a lot.I've been a DIYer since I was 12 (thanks, Dad!). I have read several books on various home improvement topics. I do not have any current code books I can refer to. I was an apprentice plumber for two years.

  5. #5
    Join Date
    Dec 2007
    Location
    Tennessee
    Posts
    1,761

    Default Re: Nothing works against this mold

    Have you tried a sodium borate solution. Check your commercial mold product to see if it has anything that has the word sodium and borate in them. Look especially for disodiumoctaborate tetrahydrate. Also look for ethylene glycol. The best products will have both.

    You can make your own mixture using 3 parts borax (laundry booster) with 2 parts boric acid (roach powder). Then add about 6 cups of this to one gallon of pure antifreeze. The antifreeze must be very hot to get the powder to dissolve so you want to do this outdoors on a camp stove. Antifreeze is very toxic. The above mix can be cut with two one or two parts water.

    Antifreeze by itself is a very good mold killer, as it he borax and boric acid mix. If the concrete is always wet, you can just put down the powder by itself and it will work, but will take a while. If there is a continual moisture problem, be sure to leave a coat of the powder on the concrete after treating, but eventually the sodium borates will leach out as it is water soluble.

  6. #6
    Join Date
    Aug 2007
    Location
    Portland, Oregon, formerly of Chicago
    Posts
    1,794

    Default Re: Nothing works against this mold

    Check out: www.concrobium.com

  7. #7
    Join Date
    Jun 2007
    Posts
    81

    Default Re: Nothing works against this mold

    Quote Originally Posted by keith3267 View Post
    Have you tried a sodium borate solution.
    You can make your own mixture...
    Keith, there is a very pricey commercial product (Don't have the name in front of me.) that can be applied to wood. Kills the mold and soaks in to keep it from coming back. Do you know if this is the same? Or do you know if your mixture can be applied to wood?
    I'm about to post a new thread in this forum with the specifics of my situation but I saw your post first.
    Thanks

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