Moss Mold Mildew Algae Stain Remover The Moss, Mold, Mildew, and Algae Stain Remover will safely and gently clean moss, mildew, and mold from outdoor surfaces. This non-caustic, non-acidic formula does not contain bleach, and is guaranteed to show visible results in 1-2 weeks after application. Product Features: Cleans exterior surfaces No pressure washing or scrubbing required Apply with normal garden sprayer Item Specifications: Size: 64 oz. 1 Gallon Product Dimensions: 9.25 x 3.25 x 6.5 Gallon WAF800006 G30938 879288000060