Formulated as a low molecular weight synthetic resin varnish, Gamvar has a refractive index similar to dammar natural resin varnish. Gamvar can safely be used sooner than other varnishes. Gamvar s mild solvent will not dissolve the glaze layers of paintings. Does not yellow and remains easy to remove. Goes on water-clear and gives great depth, intensity of color, and a protective semi-gloss surface. Covers about 320 square feet.