Aqua Lock® Plus is a 100% acrylic primer that provides excellent adhesion to a variety of interior & exterior surfaces. It has superior sealing and coverage qualities, product versatility and is an excellent base coat for both latex and oilbased finish coatings. It offers excellent stain blocking properties for water stains, wood tannin, fingerprints, smoke, crayons and more. Aqua Lock® Plus can be used under certain floor coatings.This product contains an agent that inhibits the growth of mildew on the surface of the paint film.