Wet & Forget 804064 Mold and Mildew Stain Remover, 64 OuncePerfect cleaner for small scale jobs such as porch steps, window ledges, boat seats, play equipment and more. Spray and leave application; no rinsing or scrubbing. Highlights: Size: 64 Ounce Liquid Form Ready to use Bleach free Easiest way to eliminate outdoor mold, mildew, moss, lichen and algae Requires no scrubbing, no rinsing and no pressure washing, and goes to work with the wind and rain to gently eliminate unsightly and tough growths over time