Concrete pavers treated with an acid-based cleaner, such as General Cleaner And Efflorescence Remover appear whiter after the pavement dries. Why is this?
Pavers cleaned with an acid-based cleaner will show whitening after cleaning for the following reasons: a) The pavers were not sufficiently pre-wetted when the cleaner was applied. b) The acid-based cleaner was not sufficiently rinsed off with water after cleaning and the cleaner has left a residue. c) The cleaner dried before it was rinsed away. d) A high-pressure washer was used to rinse the cleaner away. Using a high-pressure washer forces water deep into the paver, creating the potential for more efflorescence to occur as the pavers dry. e) Efflorescence on the pavers has converted to calcium carbonate (limestone). This can be difficult to remove without causing etching on the surface of the pavers. Please consult your local paver supplier for additional guidance. If a, b, or c, above occurred, clean the pavers again making sure plenty of (low pressure) water is used both before and after the cleaner is applied.
