Klean Strip Green™ Paint thinner is better for the environment because it contains no hazardous air pollutants, no ozone-depleting chemicals and is low-VOC. It is a new, revolutionary, safer paint thinner formula that thins, cleans and preps. It is milky white in color and can be used to thin any color of oil-based paint, stain and varnish without affecting the color of the dried paint.