Luckily, there are easy ways to remove efflorescence in your home. The stains are more present in darker colors due to the contrast being created by the chemical reactions. Concrete can be vulnerable to stains, especially when materials like salt will come off directly to the concrete surface. Efflorescence is a condition that can be controlled and should not exist in this day and age. What is Efflorescence? Efflorescence occurs when salt and moisture come to the surface of concrete, bricks, or stone and then evaporate, leaving unsightly white marks on your walls or floors. During the early stages of concrete curing, the hydrated cement contains some calcium hydroxide (lime) from the reaction between water and cement in the concrete mix.When the calcium hydroxide migrates through capillary action by water to the surface, as the concrete cures, it combines with carbon dioxide in the air to form a slightly soluble calcium carbonate. With any luck, the efflorescence will stay away long term after enough cleanings have been performed. If it is occurring after the pool is full, this may require a new waterproofing layer and bond coat before resurfacing the pool, or replacing tile, stone, etc.. efflorescence, the source of moisture should be determined and corrective measures taken to keep water out of the structure prior to attempted removal of the efflorescence. Efflorescence is the formation of salt deposits, usually white, on or near the surface of concrete after it has been finished and causing a change in the appearance. Efflorescence will return unless you find the source of the water seepage and fix it. Efflorescence in concrete simply means appearance of white colored powdered material on the concrete surface. Efflorescence is usually triggered by condensation, lower temperatures, rain and humidity. Efflorescence is often described as dissolvable salts in moisture that are transported through porous materials such as concrete, brick, block and stone through capillary action. Concrete and mortar manufacturers can use high quality and clean ingredients, add pozzolans and other lime-consuming materials, incorporate water-repellent and other efflorescence … Resolve the conditions needed for efflorescence to occur with the correct materials, attention to detail, and good quality construction. https://ncma.org/resource/control-and-removal-of-efflorescence For efflorescence, it takes proper waterproofing, ideally on both sides of the concrete (in the case of a raised spa or vanishing edge wall). Concrete efflorescence has a habit of reappearing, which means that you may need to repeat the cleaning process several days to several weeks after initially carrying it out. An organization of cement companies to improve and extend the uses of portland cement and concrete through market development, engineering, Efflorescence - Causes, Prevention, Repair Composition of Efflorescence The problem of efflorescence, or the deposit of water-soluble salts on the surfaces of masonry, stucco or concrete, is an old one, and one that has been studied and reported on as early as 1877.