How to Clean Concrete
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Pour muriatic acid solution onto the grease and oil stains.
The muriatic acid eats up oil and grease and produces unpleasant odors; so, be sure to keep the area well ventilated.
Wear safety glasses and long sleeves, long pants, and gloves any time you’re working with acids! If you have lung problems, get a helper so that you can cut down on the amount of time you’re inhaling fumes, or have someone else do the job.