What is efflorescence?

Efflorescence is a white, powdery substance that forms on the surface of masonry, concrete, or other porous materials when water evaporates and leaves behind salt deposits. It is often caused by water seeping through the material and carrying dissolved salts to the surface, where they crystallize as the water evaporates. Efflorescence is not harmful to the structural integrity of the material, but it can be unsightly and difficult to remove.

Efflorescence is the formation of a white powdery deposit on the surface of a material, typically brick, concrete, or stone. It is caused by the evaporation of water from the material, which brings dissolved salts to the surface. The salts then crystallize, forming the white powdery deposit. Efflorescence is unsightly and can damage the material if it is not removed.