Copper-Free Antifouling Paint.Pettit ECO HRT copper-free antifouling uses the latest technology available to create a hybrid paint film strong enough to handle the tough marine environment without building up over time. Hybrid Reactive Technology features high density biocide utilization to maximize effectiveness by using biocide more effectively along with film modifiers to reduce yearly build-up, maintain uniform color consistency, and lower weight while providing a smoother finish than traditional paints. ECO HRT smooth durable paint surface wears away over time, eliminating paint film build up and the need for sanding. This copper-free formula can be safely applied to all aluminum-hulled boats. It provides excellent antifouling protection and can be hauled and re-launched without any loss of effectiveness. Economical hybrid protection