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how to get rid of black mould on stones rocks etc.??

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  1. #1
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    Default how to get rid of black mould on stones rocks etc.??

    i have rocks all around the yard that have all sorts of black mould and crap on them, how do i go about removing it all?? don't really want to pressure clean it all if there are other options.
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  2. #2
    1K Club Member havabeer's Avatar
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    many of the "30 second cleaner" or "wet and forget" products which are pretty much just bleach will get it off.
    Remember if you don't sin, then Jesus died for nothing

  3. #3
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    Quote Originally Posted by havabeer View Post
    many of the "30 second cleaner" or "wet and forget" products which are pretty much just bleach will get it off.
    hmmm, ok, i have some of that somewhere i will give it a go.

  4. #4
    1K Club Member havabeer's Avatar
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    it may also clean the areas around it so be prepared for that I suppose
    Remember if you don't sin, then Jesus died for nothing

  5. #5
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    FWIW “Wet and Forget”, “Spray and Walk Away” have the benzalkonium chloride as the active ingredient (also commonly found in laundry rinse, swimming pool algaecide and contact lens cleaner). This not exactly a bleach and is slow acting, taking several weeks or months for full effect. However, the result can be impressive and may last up to two years (YMMV).

    I used it on my previously black concrete roof tiles and they reverted to concrete colour about 6 months after initial application.

  6. #6
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    An alternative is to embrace the natural look and paint them with yogurt mixed with a little chicken manure or blood&bone to encourage moss and lichens
    "A big boy did it and ran away"

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