What is that white powder on my pavers or wall?
The white powder is efflorescence, a deposit that may sometimes appear on the surface of the paving stones. Sometimes this appears immediately or a few months after installation. Normal use and exposure to the weather will dissipate the efflorescence, as will normal wear. Efflorescence is a normal occurrence in all cement-based products. As it is a natural reaction to the proper hydration of concrete, we do not consider it a defect and do not replace any materials affected. If you feel that efflorescence is undesirable, there are a number of solutions that can be used to remove it.