How to Clean Bricks With Muriatic Acid

Updated February 21, 2017

Muriatic acid is an extremely powerful acid used as a cleaning agent. The acid is commonly used in masonry as it cuts through stuck on mortar and other hard to clean substances. Muriatic acid should only be handled with extreme care as it can burn the users skin and cause damage to almost any surface. Cleaning bricks with muriatic acid will ensure the bricks are cleaned spotlessly but it's important to know the correct way to handle the acid and clean the bricks.

Place a dust sheet down to ensure surrounding items and surfaces are not damaged by the muriatic acid.

Fill a plastic bucket with 1 gallon of water. Add 1 cup of muriatic acid to the water. Make sure to add the acid to the water in this step to ensure the acid does not burn through the plastic bucket.

Spray the bricks with a garden hose before applying the mixture. Put on a pair of work gloves to protect your hands from the acid. Saturate a rag with the water and muriatic acid mixture.

Apply the mixture to the bricks being careful not to get the mixture on your skin. The bricks should be well soaked with the mixture. Allow the mixture to set in and clean for two minutes.

Scrub off the mixture and any debris or dirt using a stiff bristled masonry brush. Scrub the bricks clean while rinsing with a garden hose to wash the mixture off the bricks. Continue this process until the bricks are cleaned and the muriatic acid is completely washed off.


Wear heavy duty work gloves, long sleeves and protective eyewear anytime you work with muriatic acid.

Things You'll Need

  • Plastic bucket
  • Gallon of water
  • Cup of muriatic acid
  • Rags
  • Still bristled masonry brush
  • Garden hose
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About the Author

Johnathan Cronk is a freelance writer and began writing at the age of 18. Throughout his career he has specialized in sports, how-to and advice articles. He has also written sales pitches in the corporate setting since 2001. He studied business at Hudson Valley Community College before transferring to the State University of New York, Albany.