What type of paint is used on ship hulls to prevent barnacle growth?

Antifouling paint is specifically designed to prevent the growth of marine organisms, such as barnacles, on the submerged portions of ship hulls. This type of paint contains biocides that inhibit the attachment and growth of these organisms, ensuring that the hull remains smooth and free from fouling. A smooth hull is crucial for maintaining efficient movement through the water, as barnacle growth can create drag and reduce the vessel's speed and fuel efficiency.

Waterproof paint is typically focused on preventing moisture intrusion but does not possess the necessary properties to combat marine growth. Abrasion-resistant paint may help protect against wear and tear but does not address the issue of marine fouling. Intumescent paint is used primarily for fireproofing and does not relate to underwater applications or the prevention of marine growth. Therefore, antifouling paint is the most appropriate and specialized choice for this specific purpose on ship hulls.