How To Clean Pavers With Muriatic Acid. Use a solution of one part muriatic acid to ten parts water to clean your driveway. Acid etching cleans by removing a very thin layer of the surface of the concrete.
Make sure that the acid is dilute or it might do the opposite of removing cement stains and rather damage the surface of the pavers. Wet your driveway with water, then start at the highest part of the driveway and sprinkle acid over the full driveway surface. The way i clean my pavers ( well my husband) is first we rent a power washer.
Applying the acid to only the stained parts of your driveway will unevenly discolor the concrete.
The resulting pitted surface sucks water into the brick and concrete mortar. However, if the pavers are a little more dirty than normal, then you may want to increase the potency of the acid. Dilute the muriatic acid and pour it into a plastic watering can. Set the acid on the entire affected areas and allow it to stay for about 10 minutes before scrubbing it to get rid of stubborn dirt and residue that may have settled in between the pavers.