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Efflorescence

Powdery White Stuff on Retaining Walls: The Efflorescence Mystery

Did you know that the white, powdery tint on brick and stone has a name?  Yep.  It’s Efflorescence.  This substance is a deposit of salts which form if water is present.  Some people like the look on clay pots for a vintage appearance but on retaining walls and other building surfaces it looks like structures are grimy and not well kept.

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