Wet and Forget Moss, Mold, Mildew & Algae Stain Remover.75 Gallon Concentrate Makes 4.5 Gallons - 2 Pack

Wet & Forget's spray & leave formula works with the wind and rain to gently clean outdoor surfaces over time. There's no scrubbing, rinsing or power washing. Simply mix 5 parts water to 1 part Wet & Forget in a pump-up garden spray and apply to virtually any outdoor surface- that's it! Wet & Forget's bleach-free formula goes to work cleaning the surface for you!