Marine Mildew Block # An Invisible Barrier that Prevents Mildew Growth This innovative, state of the art barrier provides long lasting protection on virtually any surface above the waterline including sails, seat cushions, carpeting, canvas, deck furniture, rub rails, showers, boat covers, vinyl windows and more! It is non-toxic, contains no bleach and is the only well known brand of its kind on the market. Features: # Developed for harsh marine environments # Ready to use half liter spray bottle # Application: thoroughly clean surface of existing mold or mildew, then spray on