Dual-Biocides Offer Excellent Multi-Season Protection . Clean, bright colors along with a true white and true black . Thin application & self-polishing surface reduces build up . Hybrid technology is excellent for racing, trailering, or rack stored boats . Can be hauled and re-launched without repainting. Safe for use on properly primed aluminum. Use 120 brushing thinner or 121 spraying thinner?sold separately