Concrete floors are a very low maintenance flooring option. Sealed concrete is when a concrete sealer has been applied on the concrete flooring.There are clear sealers and colored sealers that can alter the appearance of the cement floor. In addition to altering the "look" of the floor sealers can increase the durability of the concrete floor by protecting it from the weather, stains and scratches. As one of the most durable flooring options the very hard surface of cement is defiantly not something anyone wants to fall on. The slick smooth surface is very slippery when wet and especially when the flooring is in a high traffic area the risk of someone slipping on the concrete is very high.