Jomax mildewcide concentrate is a patented formula that mixes with water and household bleach to make an effective and economical solution to remove mildew from exterior surfaces. Use Jomax to remove mildew stains from almost any nonporous exterior surface including painted siding and trim, vinyl and aluminum siding, stained or painted decks or fences, stucco, brick, and masonry. Porous surfaces may require multiple applications. Can be used near plants or shrubs. To make 5 gallon of solution mix 3 quart of household bleach with 4 gallon of water and 1 quart of Jomax . 5 gallon treats approximately 1000 sq. ft.