Once the salts are introduced into the pavement system, the only way to remove the efflorescence is to get rid of the salts. For this reason, to develop a plan, you must first determine the source of the salts and eliminate them if possible. Once the salts are gone, the efflorescence will stop with time as nature cleanses your pavement. The amount of time it takes is directly proportional to the amount of salt in the pavement. While the efflorescence you see can easily be washed away with clear water and a brush, any remaining salt in the pavement will resurface after the next rain.