Because the RESISTHANE™ Plus, SuperLac™, and POLYSHIELD® and most clear water-based finishes are water clear, in some applications the slightly amber tone (typically imparted by standard nitrocellulose lacquers, solvent-based polyurethane, or a varnish) is often desired. Gives more warmth and depth to the natural wood grain. The Amber Additive does an excellent job in simulating that conventional lacquer look. Add 1 fluid oz. per quart to all the finishes mentioned above or any other water-based finish. Please follow label directions prior to use. Green Technology™ Formula.