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        Concrete sidewalk
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        dlg
        posted
        Does anyone know what will clean concrete sidewalk and patio which has black (mold????) on it. Used to be able to use TSP but not anymore.
         
        Posts: 11 | Registered: Jul 04, 2007Reply With QuoteReport This Post
        Nestor
        posted Hide Post
        Bleach.

        If bleach doesn't kill it, it's not alive.
         
        Posts: 1090 | Location: Winnipeg | Registered: Aug 29, 2011Reply With QuoteReport This Post
        mosternaz
        posted Hide Post
        Nestor, that was an uncharacteristically short answer. Didn't know you had it in you!
        Just kidding - I do like the information you give.
         
        Posts: 2424 | Registered: Apr 11, 2005Reply With QuoteReport This Post
        Nestor
        posted Hide Post
        I had to go to the bathroom.
         
        Posts: 1090 | Location: Winnipeg | Registered: Aug 29, 2011Reply With QuoteReport This Post
        Jaybee
        Picture of Jaybee
        posted Hide Post
        You guys crack me up!

        To the OP - pressure washing works wonders on concrete although even with cleaning it with pressurized water it would be a good idea to add a bleach mixture to kill the mold that can remain even if it looks clean.


        Jaybee
         
        Posts: 9071 | Location: Knoxville, Tennessee | Registered: Sep 27, 2003Reply With QuoteReport This Post
        The Patio Guy
        posted Hide Post
        Speaking of cracking up! Hey Jaybee, I've been sealing concrete with great results...a product called Seal-once. check it out on google...makes the surface waterproof, but allows it to breath...prevents moisture build up...prevents freeze thaw damage/cracks...
         
        Posts: 6 | Registered: Aug 20, 2012Reply With QuoteReport This Post
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