With masonry stains, you can achieve uniform color easily and reliably--even after the building is built. Opaque and semi-transparent stains are inexpensive, easy to apply, and available in virtually any color. WHAT IS A STAIN? Stains typically are made of nonfading pigments and tough, flexible acrylic resins. Other ingredients include ultraviolet light absorbers, color stabilizers, binders, freeze-thaw stabilizers, mold and fungus inhibitors, antisettling agents, surfactants, and emulsifiers. Together these ingredients color and protect the surface. APPLICATION HINTS Surfaces to receive stains should be clean, dry, and free of efflorescence and mortar droppings. Any previous silicones, paints, or other sealers should be removed. Allow the masonry to cure for at least 28 days before staining it. THE PRICE IS RIGHT Stains usually cost less than integral color. Cost of stains vary, though, with the size of the project and the number of different colors used. BETTER COLOR UNIFORMITY Color stains produce uniform color more reliably than do integral color block and mortar.