Surecrete 35102013-54 Harvest Yellow Eco Stain colors are based on gray concrete with stain applied at standard strength, no additional dilution, with two applications and is sealed with a penetrating color enhancing sealer. SureCrete recommends the use of SCR for surface preparation preceding the application of Eco-Stain. Color samples represent the color of finish as closely as possible. Color variations may occur due to differences in cement, aggregates and methods of application.