I have 30% and 5% and I'm guessing it's somewhere in between.

  • Hello, and welcome to Home Improvement. Unfortunately, this is off-topic in this "Home Improvement" stack. And, you should probably take our tour so you'll know the details of contributing here. – Daniel Griscom Nov 25 '20 at 17:10
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    I’m voting to close this question because it isn't about Home Improvement. – Daniel Griscom Nov 25 '20 at 17:10
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    @DanielGriscom I'd say killing household mold is pretty much a home improvement. That is, unless you want the OP to wait until it ruins their walls and then ask how to fix them. :-) .. stay safe. – JACK Nov 25 '20 at 17:41

5% appears to be adequate per a brief search of the web.

30% is not really "vinegar" anymore - call it acetic acid and treat with care.

I have seen 10% sold as "cleaning vinegar" but I don't find any results in a quick search indicating it's much more effective than undiluted 5% on mold.


I've used white vinegar which runs about 7% and it's worked great for surface and below surface mold whereas bleach is only good for surface mold. if you've really got vinegar that's 30%, I'd handle with care and get rid of it.

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    Dilute (adding acid to water) and use is a perfectly acceptable way to "get rid of" 30% – Ecnerwal Nov 25 '20 at 18:01

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