<p>The most effective strategy for controlling biofouling is the release of toxic antifouling agents, but this approach triggers environmental concerns and leads to stricter international legislation. This study proposes a novel, simple, and convenient method for grafting antifouling agents by using a silane coupling agent to introduce Econea into low-surface-energy coatings. The amount of introduced antifouling agent can be precisely controlled. Compared with traditional antifouling agent-releasing coatings, the leaching rate of the grafted antifouling coating is only one-sixth that of conventional coatings, having maintained satisfactory antifouling performance for 141&#xa0;days in real-world marine trials. Furthermore, this study demonstrates that introducing Econea into low-surface-energy coatings via a coupling agent does not significantly alter its original antifouling properties. These findings not only address industry concerns but also establish a framework for the grafting technology of novel antifouling agents.</p> Graphic abstract <p></p> <p>Silane coupling agent graft coating shown is highly resistant to dirt from marine biological organisms.</p>