Lilly Miller Moss Out Heavy Duty Cleaner is biodegradable and does not contain chlorine bleach, ammonia, or phosphates. It is safe for people, pets, and plants. The product label does state: Wet surrounding areas and plants with clear water. Product oversprayed onto these surfaces can be neutralized with large volumes of water.
Yes, Lilly Miller Moss Out Heavy Duty Cleaner can be used on composite shinges. Per the product label:
CLEAN ASPHALT SHINGLES, COMPOSITE AND TILE ROOFING WITHOUT
RINSING: Use Moss Out! Heavy Duty Cleaner as a “leave on” spray to clean
these surfaces without rinsing. Carefully remove all loose moss and debris from
roof using a leaf blower, broom, or rake. Mix 1 part Moss Out! Cleaner in 9 parts
water. Apply product to a dry roof using a tank sprayer or sprinkling can.
Thoroughly coat shingles or tile at the rate of one gallon mixed spray to 200 sq.
ft. (20’x 10’). The contents of this container will cover 2,000 sq. ft. (50’x 40’) of
roof. Allow spray to dry. Stains will darken during the treatment. After several
heavy rainfalls the roof will be returned to a bright, clean appearance, free of
fungus and moss stains.
When using Lilly Miller Moss Out Heavy Duty Cleaner it would depend on several things. The slope of the hill, and how much product and water you would be using, is there grass on the hill, etc. You definitely would not want to use this if there are fish in the pond per the manufacturer.
