general finishes enduro-var water based urethane topcoat, 1 quart, semi-gloss general finishes enduro-var wood finish is a self-crosslinking, oil-modified, water-based polyurethane that looks more like an oil varnish than a water coating. it ambers slightly, is highly water resistant, and is both sprayable and brushable. enduro-var water-based topcoat adheres well only over water stains, dye stains and raw wood. use enduro-var over any other surfaces at your own risk.