All Purpose NAS-12 Cleaning Solution - Safely Remove Stubborn, Black Mold Stains And Mildew Stains Without Chlorine Or Bleach. Chlorine bleach products can be harmful with prolonged use. All Purpose NAS-12's safe, non-toxic, biodegradable, odorless formulation works on shower walls and curtains, grouting, vinyl outdoor furniture, vinyl wallpaper, paint surfaces, boat exteriors, leather... any surface where mold and mildew grow. All Purpose NAS-12 is pre-mixed, easy to use and contains no chlorine. Spray it on, let it stand for a few minutes, then scrub lightly with a sponge or cloth. Helpful Tips: *After cleaning with NAS-12, we highly recommend applying No More Mildew spray which forms a long-term protective coating that keeps mold away for one to two years. *For easier application, try the Duroblast Rechargeable Power Sprayer. Ideal for prolonged spraying applications, it significantly reduces finger and hand fatigue experienced with mechanical pump sprayers. Gallon Bottle (no sprayer).