Wednesday, August 27, 2008

How to Acid Wash Concrete

Using a muriatic acid wash is the solution of last resort for cleaning stubborn stains and blemishes from concrete. The acid works by dissolving the concrete to remove the stain and it can permanently damage concrete if mishandled.



Step1
Try every other means available to remove stains from concrete before using muriatic acid. (See Related eHows.)


Step2
Purchase muriatic acid from a home improvement retailer or a chemical wholesaler.


Step3
Put on protective clothing and gear before handling the acid, including goggles and rubber or latex gloves.


Step4
Read the manufacturer's application directions carefully and follow them exactly. Apply only as much acid as needed, no more, and let it soak into the concrete surface for several seconds.


Step5
Rinse the acid off the concrete with water using a pressure washer set at 2500 to 3000 PSI and contain the resulting runoff so that it does not enter a storm drain.


Step6
Sprinkle baking soda over the area you treated with acid to neutralize the solution.


Step7
Take the runoff water to a recycling center that accepts hazardous materials.


Step8
Assess how much the acid damaged the concrete and consider resealing the concrete to prevent future stains or deterioration of the concrete.

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