What is the white residue on my EarthStone patio stones?
The development of a white residue on the surface during the early life of some concrete products is referred to as efflorescence. Since efflorescence is a naturally occurring phenomenon, it is not possible to be sure when, or if, efflorescence will appear. The effect generally disappears with the natural weathering process and the passage of time. It is in no way detrimental to the long-term durability of the product.
