Cover over problematic areas while preventing the growth of mold & mildew. As it fully blocks stains & odors while preventing future growth & spreading, the intended surface doesn't even require extensive prep or pre-cleaning before application. Use Zinsser Mold Blocking Primer Spray to cover & block nearly all forms of pre-existing mold, mildew, moss & fungi as well as most forms of odor-causing bacteria. Since this primer is also compatible with all topcoat products except solvent-based lacquers, it might very well be the perfect solution for non-porous interior or exterior surfaces in residential basements, attics & bathrooms as well as commercial factories, warehouses, storage facilitiesnearly anywhere it might be needed. Convenient aerosol spray format is ideal for small projects, spot priming & touch-up work. Paint Sub-Category: Oil-Based; Primer; Spray Paint; Intended Application Environment: Interior / Exterior; Finish / Sheen: Flat; Color(s): White.