Water soluble coating for use as a barrier coat on certain rubber molds to reduce resin attack on the mold. Can also be used as a removable sealer on porous surfaces. Release agents such as Pol-Ease 2300 should be used in addition before applying liquid polyurethane to a coated master or before casting liquid plastic into a coated mold. Available in clear or green colors. The green may stain some porous surfaces.