One of the great advantages of concrete is that it can be constructed to provide its own finished surface without further treatment or decoration. Nevertheless, there are times when concrete does require a coating or when the owner may want a coating even though it is not strictly needed for protection. Some reasons for coating concrete are: decoration, when it's desired to provide some combination or color and texture to concrete already constructed or when it's thought that a coating would produce a more suitable color; dampproofing or waterproofing, particularly when the concrete construction is too porous; protection of concrete against chemical attack; protection of concrete against freezing and thawing; and elimination of dusting of concrete that was improperly constructed or cured. No paint will serve any and all purposes, and there are no final rules by which the best choice of paint can be prescribed. What can be done, however, is to provide a list of the kinds of paint that are currently being used most successfully in a variety of application. So, if the question is, "Which of these three sorts of coatings should be used for this floor?" it's time to seek the advice of a trusted supplier. The number of choices within any class is large, and it's likely that some of the choices would be unsuitable for use on floors. The porosity of the concrete will have some effect on its acceptance of paint. A porous surface will absorb great quantities of paint in comparison with a surface that is dense and of low absorptivity. On the other hand, a concrete surface that contains residual form release agent, curing agent or a contaminant may not accept paint or not accept it uniformly. In general, the concrete should have a low moisture content and be surface dry when the paint is applied so that the coating will bond properly. It is possible, however, to apply latex paints to slightly damp surfaces because latex paints contain water. Some of the foregoing considerations may influence the final selection of a coating. To all of them must be added price, ease of application and life expectancy. The list, found in the article, is an effective way to start the selection process.