Mold Blocking Primer Spray, Interior/Exterior, Flat White, 13 oz Aerosol Can, 6/CartonCover over problematic areas while preventing the growth of mold and mildew. As it fully blocks stains and odors while preventing future growth and spreading, the intended surface doesn't even require extensive prep or pre cleaning before application. Use Zinsser Mold Blocking Primer Spray to cover and block nearly all forms of pre existing mold, mildew, moss and fungi as well as most forms of odor causing bacteria. Since this primer is also