Cabot Wood Cleaner is specially formulated to remove stains caused by mold, mildew and algae, as well as dirt and other foreign matter, from painted, stained or weathered wood surfaces. Unlike other mildew stain cleaners, this easy-to-use Cabot product does not require the addition of bleach in order to be effective. Use for routine cleaning and for properly preparing all surfaces prior to staining or painting. Cabot Wood Cleaner is not a paint or stain remover. It will, however, remove paint or stain on an unsound surface.