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Posted by PipeDown on May 15, 2006, 3:35 pm
If it is efflorescence, use a cleaner labeled to remove that. Muriatic acid
will work but probably too aggressively.
If it is a surface contaminant like dirt, use a power washer with concrete
detergent
> How do I get the white marks off of the concrete near my house......It has
> happened after all the rain we have had....Thank you for your help...k
>
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