Prevent mold and mildew in moisture-prone areas with Rust-Oleum Zinsser ADD-2 PREVENT MILDEW Mildewcide Additive. Simply mix this easy-to-blend formula into paint, stain or wallpaper adhesive to infuse that coating with long-term mold/mildew protection. Proven, long-term mold and mildew protection. Blends easily into all interior or exterior, latex or oil-based paints, stains and wallpaper adhesives. EPA registered fungicide to prevent mold & mildew on coating film. Will not affect color or performance of paints, stains or wallpaper adhesives. Available sizes: 10 gram packet treats 1 gallon. 50 gram packet treats 5 gallons.