The protective properties of the sealer coat leave a non-porous finish. The majority of stains due to oil and grease wash off with mild detergent. Salt, deicers, etc. have no effect on it. In addition, because of its unique UV (ultraviolet) additive, it will not discolor due to exposure to sunlight, even in the harshest of conditions. It should be noted, however, that periodic cleaning will help maintain its beauty for many years to come. Cleaning can be performed with a mild detergent such as Concrete Coatings, Inc. EZ Clean. In fact, these protective properties must be maintained through biennial cleaning and sealing.