Excellent a removing dark tanins, biological mineral deposits and brown waterline stains on hulls. Cleans and removes algae, mold and mildew stains from boat bottoms, upholstory, canvas and deck wood. Brightens exteriors including wood decks, aluminum windows, siding and storm doors. Dissolves rust and tarnish stains. Completely removes slime and grime

suitable for fibreglass, gelcoat, metal, wood and concrete.