Liquitex High Gloss Varnish is ideal for use over any acrylic painting on a rigid support. Do not use on flexible surfaces such as canvas as the varnish will crack. It is permanent and highly durable for superior protection. Increases the depth and intensity of underlying colors. The easy to use and clean up water-based formula is sandable for furniture grade wood finishes. Hard, archival, non-yellowing and water resistant when dry. For interior use only.