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pressure clean and chemical wash concrete driveway? what chemicals?

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  1. #1
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    Default pressure clean and chemical wash concrete driveway? what chemicals?

    whats involved in chemical washing of a concrete driveway that is blackened from mould??
    i got a quote for this and they pressure clean and chemical wash. whats involved in chemical washing concrete??
    how does that get rid of mould more than pressure cleaning?? i thought just pressure cleaning got rid of mould??

  2. #2
    Seasoned DIY droog's Avatar
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    Default

    Probably using something similar to this :
    https://www.30seconds.com.au/product...tdoor-cleaner/

    Pressure cleaning doesn’t kill the spores it just blasts away any growth matter, some spores may remain in deep crevices.

  3. #3
    4K Club Member Marc's Avatar
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    Pressure cleaning first, then apply this product
    https://www.mitre10.com.au/30-second...B&gclsrc=aw.ds

    Or this one
    https://www.tilersonline.com.au/tile...Lw_wcB#gallery

    Bleach is a poor mould killer, and has no residual effect. Benzalkonium Chloride is the right choice. Be careful when applying since it will also kill any plants that you spray on.
    Science is never settled,
    it advances one funeral at the time.
    Max Planck

  4. #4
    Golden Member havabeer's Avatar
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