MM19 Poly-U-Gloss Varnish is specially formulated for use in folk art techniques, this water-based finishing varnish provides a clear high gloss non-yellowing finish. For a protective surface coating use direct from bottle. Do not dilute with water. Allow at least 6 hours drying time between coats. Do not use Matisse MM19 Poly-U-Gloss Varnish over oil-based paints or oil-based antiquing finishes. Do not use on paper, canvas or other flexible substrates. Water-resistant, heat-resistant, quick drying, and flexible.