Modern Masters™ Venetian Plaster™ Topcoat (VP300) is used as a protective sealer over the dry Venetian Plaster finish. High traffic areas where washability is imperative, or rooms that experience high levels of humidity, such as bathrooms, should be sealed with Venetian Plaster Topcoat. The Venetian Plaster Topcoat is especially formulated to preserve the appearance of the finished Venetian Plaster surface. Other protective topcoats cannot be used to protect the surface.