Definitions for "Muriatic acid"
Commonly used as a brick cleaner after masonry work is completed.
Concentrated hydrochloric acid often diluted and used for etching concrete.
A diluted form of hydrochloric acid. Muriatic acid is used to test for the presence of sufficient seal on concrete. Improperly sealed concrete will have a noticeable chemical reaction with even a few drops of acid. A sufficient coating of seal will prevent the acid from interacting with the concrete.