Flat paint is a term for a finish that does not reflect light, resulting in no sheen at all. This lack of reflection allows more paint pigment to come through, is more forgiving of flaws and allows for excellent hide, creating a uniform surface. Use caution when considering flat paint in high-traffic areas that require frequent attention. Stains are harder to remove from low-sheen paint, and constant rubbing or cleaning can result in burnishing.
The most common interior wall paint is flat. Flat paint helps to minimize any imperfections in the wall or ceiling. There are multiple different grades of paint to meet a wide range of application needs. From low cost paints typically used in rental properties to products designed to give more washability.