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Thread: oxalic acid

  1. #1
    Join Date
    Nov 2004
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    Melbourne
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    173

    Default oxalic acid

    Dont know if I spelt it right but has anyone used this to restore a weathered timber deck. The brand of timber cleaners from cabots, feast and watson etc have 10% acid in their mix but it costs $15/liter whereas straight acid crystals cost only $9 a half kg, which I think will work out cheaper when I have 200m2 of deck to do. Has anyone got any tips or traps to avoid.

  2. #2
    Join Date
    Feb 2003
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    Garvoc VIC AUSTRALIA
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    Default

    It will completely eliminate the weather gray from timber.
    Use gloves etc, eye protection also very worthwhile.
    As it looks just like sugar be sure to properly lable it and keep it in a very safe place
    Regards, Bob Thomas

    www.wombatsawmill.com

  3. #3
    Join Date
    Jan 2004
    Location
    South of Adelaide
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    Default

    I think I have used this stuff in a leadlight course I did a few years ago, but I cant remember what it did. Oh well another senior moment I suppose!!
    Jack

  4. #4
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    Jun 2004
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    Bunbury W.A.
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    Default

    The easiest way to use is to head to your nearest chemical manufacturer and buy it pre-mixed.
    It has been a while since i last used it but PPE requirements were saftey glasses, mask, rubber boots and leather or PVC apron.
    Oxalic is also very good at removing oxide stains caused by bore water.
    We just brushed it on using a kichen broom, but you may need something coarser like a BBQ brush, it crystalises as it dries and simply hose it off.

    Hope this helps
    Steve
    if you always do as you have always done, you will always get what you have always got

  5. #5
    Join Date
    Jun 2003
    Location
    Sunbury, Vic
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    Default

    If you mix it yourself make it a 10% solution.
    As the others have said re safety
    Tom

    "It's good enough" is low aim

  6. #6
    Join Date
    Nov 2004
    Location
    Melbourne
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    Default

    i think i will buy the crystals and mix my own, dont know what other goodies the cabots etc deck clean has in it but for the price I think i will stick with the crystals.

  7. #7
    Join Date
    Jun 2003
    Location
    Western Sydney
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    149

    Default

    Oxalic acid & benzyl ammonium choloride or similar; its an algicide, try / check pool treatment products.

    Cheers,
    Theva

  8. #8
    Join Date
    May 2003
    Location
    Kuranda, paradise, North Qld
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    Don't mix it too strong or leave it on too long as it will stain your timber a lovely shade of "urine yellow" :eek:

    Mick
    "If you need a machine today and don't buy it,

    tomorrow you will have paid for it and not have it."

    - Henry Ford 1938

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