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  1. 10-09-2013, 20:53 #1
    BigBear
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    Default Help Needed: Cleaning Concrete

    Hey guys,
    I have a 10x10 (ish) patio. It has paint stains, grease, dirt, etc all over it. Is there a way to clean it? I've tried some of the Google-fu stuff (baking powder paste, etc) and nothing is working. It's be nice to just stain it... but it's part of an apartment complex.

    Thanks,
    Bear
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  2. 10-09-2013, 20:55 #2
    StagLefty
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    Muriatic acid ?

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  3. 10-09-2013, 20:59 #3
    Eric P
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    Phosphoric acid, the green fluid at Home Depot. Muriatic acid may be too strong and eat away too much of the surface leaving exposed coarse aggregates.
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  4. 10-09-2013, 21:01 #4
    Wulf202
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    pressure washer
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  5. 10-09-2013, 21:03 #5
    SideShow Bob
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    Quote Originally Posted by StagLefty View Post
    Muriatic acid ?

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    That will definatly do the job. Keep kids and pets away, and it will kill plants & grass, so use carefully. Also be sure to wear eye protection, chemical resistant gloves and old heavy long sleeve clothing. No shorts either.
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  6. 10-09-2013, 21:14 #6
    BPTactical
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    Why would you be doing it if it is an apartment complex? Not your responsibility and I would not want the liability, especially if you are planning on using the nuclear option such as acid.
    Muriatic or phosphoric are too strong, they will damage the wood fibers and you will play hell neutralizing them once soaked in the wood.
    Oxalic acid is used for bleaching wood and is not nearly as nasty to work with.


    (edit: call me a maroon, for some reason I had a wood deck in mind-I shall now hang my head in shame)
    Last edited by BPTactical; 10-10-2013 at 05:41.
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  7. 10-09-2013, 23:25 #7
    sako55
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    Product called pour and restore. Gets hydraulic fluid off. Should work on most.
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  8. 10-10-2013, 01:37 #8
    Rabid
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    Quote Originally Posted by Eric P View Post
    Phosphoric acid, the green fluid at Home Depot. Muriatic acid may be too strong and eat away too much of the surface leaving exposed coarse aggregates.
    This but to echo BPTactical why if it is not your place?
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  9. 10-10-2013, 06:24 #9
    Eric P
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    Quote Originally Posted by Rabid View Post
    This but to echo BPTactical why if it is not your place?
    We do not know why nor need to know why. The op asked a question and an answer was supplied.

    Grinding kitty litter into the surface can also draw out grease and oil
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  10. 10-10-2013, 06:30 #10
    Jeffrey Lebowski
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    Quote Originally Posted by Wulf202 View Post
    pressure washer
    This with Zepp concrete cleaner from homey depot has always worked pretty well for me....
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