is the only copper and tributyltin-free alternative antifouling paint for heavy duty applications. Formerly only available for use by U.S. government agencies, SN-1 is EPA registered and now approved for use on commercial vessels and commercial application. SN-1 is recommended for boats in fresh and salt water. SN-1 offers excellent antifouling protection in even the harshest marine environments. SN-1 features ePaint’s patented photo-active technology and Sea Nine 211N ™ active, a potent broad spectrum biocide that prevents both hard and soft-type fouling and is also winner of the EPA’s first Presidential Green Chemistry Challenge Award for its non-persistent effects on the environment. SN-1 is compatible over most popular antifouling paints and easy for commercial applicators to apply. Like all ePaint's, SN-1 is copper-free and will not promote corrosion on aluminum, steel or metal parts. SN-1 is perfect for all boats and hull types.