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Ultimate Defense is a hard antifouling product effective against fouling organisms; slime, aquatic plants and animals. Ultimate Defense is suitable for professional and consumer application onto vessels in fresh, salt and brackish water. The hard scrubable finish is suitable for burnishing to provide a smoother finish. Provides protection for up to one year. Quick overcoat and launch time. Excellent season-long protection42.75% CopperHard, durable finishCan be burnished for a smooth finishIdeal for fiberglass, wood and properly primed metal - do not use on aluminumApply with brush, roller or conventional/airless spray