30 seconds Outdoor Cleaner Algae, Mold Mildew Stain Remover Original 30 seconds outdoor cleaner. Fast acting cleaner removes stains from algae, mold, and mildew. Also instantly removes dirt and grime from virtually all outdoor surfaces. No need to use a noisy pressure washer. Specifically formulated to be effective on all exterior surfaces including decks, siding, patios, walks, porches, steps, lanais, pools, boats, recreational vehicles, tents, patio furniture, awnings, and more. Safe to use around lawns and landscaping. Will not stain concrete. Non-corrosive to metals when used as directed. Size 2.5 Gal., Concentrate Or Ready To Use Concentrate, Product Form Liquid, Application Type Pourable, Mix Ratio 1 1, Coverage 500 Sq. Ft., Pkg Qty 1, Package Type Bottle