PVA (Polyvinyl Alcohol) should be used with #1016 Wax to aid in the release of parts from a mold. It should be applied in three thin mist coats over nonporous, waxed mold surfaces. After the final wax coat has dried, begin by spraying a light tack coat of PVA. Typically, within 5 minutes the final heavier coats can be added. The PVA dries to form a smooth, glassy film. After part release, the residual film can be removed with water. We recommend using our 123-A or 126-A Touch Up Spray Guns for larger molds, but for smaller molds, use our 2251 Preval Sprayer . PVA can also be sprayed over any polyester repair to provide an airless tack-free cure.