Birchwood Casey Walnut Stain - Water soluble stains are sun-fast, true to color and non-bleeding. Produces a clear, rich color without grain clouding or smearing. Highlights the grain and enhances the natural beauty of wood. Walnut Stain is a true, brown-walnut color for the traditional look. Color intensity is easily controlled by adding water to concentrate or using full strength for light colored woods such as birch. Water-soluble stain that is true to color. Easily thinned with water to reduce color intensity.