Used for etching and cleaning of brick, stone, tile, concrete and other masonry surfaces. Can also be used to lower the pH of swimming pool water. For cleaning and etching applications always start with diluted acid and test the affects in an out-of-the-way area. Always add the acid into the water when diluting. Pouring water into acid can cause splattering and violent eruption on the mixture. Acid solutions can be neutralized with baking soda, soda ash, lime or household ammonia solutions. Flush neutralized acid with plenty of water.
* Be sure to wear all protective equipment!*