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Posted by clintonG on July 2, 2006, 12:54 pm
Dilute the HCL with water about 40% water will still be okay and use a stiff
brush (not wire in this case) to brush the concrete stains away. Rinse well
with clear water after brushing.
<%= Clinton Gallagher
NET csgallagher AT metromilwaukee.com
URL http://www.metromilwaukee.com/clintongallagher/
> On Sun, 02 Jul 2006 11:01:01 -0400, Mike Robinson wrote:
>
>> Muriatic acid is HCl (Hydrochloric acid).
>> It will probably soften the concrete, and eat a hole in your door.
>
> That depends on what concentration of solution of HCL.
> I'm going to try vinegar first, and if that doesn't
> work, a weak solution of HCL, probably ~ 10% to start
> off with.
>
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