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Home Armor HA503 delivers professional-grade cleaning power in a concentrated formula designed for outdoor surfaces. This 1-gallon concentrate tackles tough stains, mold, mildew, and algae on decks, patios, siding, and roofing with minimal effort. Mix to your desired strength for customized cleaning intensity, making one gallon stretch further than ready-to-use alternatives. The potent formula breaks down organic growth and weathered buildup effectively, restoring surfaces to their original appearance. Ideal for homeowners seeking reliable, economical outdoor maintenance solutions that don't compromise on performance.