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Remove green and black stains caused by algae mold and mildew using Spray and Forget Revolutionary Exterior Surface Cleaning Treatment. No rinsing is required saving valuable time and it continues to prevent stains with subsequent rainfall. For use on multiple roof types including asphalt wood slate and clay/tile. Also works on brick walls decks fences driveways walkways siding and stucco. Remove green black roof stains caused by algae mold mildew Concentrated formula 5 Gal. makes up to 50 Gal Use on asphalt wood slate and clay/tile shingles Removes stains caused by algae mold and mildew Cleans 700 sq. ft. to 1200 sq. ft. per gallon of concentrate total coverage for 5 Gal. of concentrate: 6000 sq. ft. No rinsing required let mother nature do the rinsing for you Keeps cleaning long after application Can be used for preventative maintenance Use on multiple exterior surfaces Spray and forget it’s that easy Each gallon of concentrate makes up to 10 Gal. of cleaner Remove stains caused by algae mold and mildew with the selection of this Spray Forget Revolutionary Exterior Surface Roof Cleaner Concentrate.