This fast drying, premium primer provides excellent adhesion and mildew resistance to non-staining wood. Ideal for use on siding, trim, shakes, shingles and fences. It can also be used on masonry, concrete, concrete block, stucco and vinyl siding. Provides a uniform, sealed surface to assure even spreading and good adhesion of finish coats. Exterior 100% Acrylic Latex PrimerPromotes Adhesion and Durability of TopcoatMildew Resistant