Perma-Cast® Sierra Concrete Stains are a penetrating, reactive stain that chemically combines with cured concrete to produce permanent variegated coloring effects. There are 7 colors to pick from and because there are so many variables involved in the chemical reaction process, Perma-Cast(r) Sierra Stain produces unique results. Wide color variations, mottling, and unevenness of the color are normal and usually desired. If these coloring effects are not desired, Sierra Stain should not be used. Coverage is approximately 300 square feet per gallon, and this package includes four one-gallon bottles. Made in the USA with Global Materials.