Modern antifoulings tend to fall into two main categories which are self-polishing (also called erodible or ablative) and hard. Generally the raw materials used to make up these antifoulings is similar and it is the proportions, quality and binders used that determine their properties.

Self-polishing antifouling is the most widely used. This type is partially soluble in water and so once immersed the resin binders are broken down in a controlled manner which continually exposes a fresh layer of biocide. Jotun’s range of antifouling uses advanced resins and binders that ensure a more controlled and more efficient polishing action which provides consistently good performance throughout an entire season. Self-polishing is the preferred type in high fouling waters.

Hard antifoulings work on a principle known as contact leaching. Upon application hard antifoulings dry to form an insoluble resin that is packed with biocides which leach out on contact with water to prevent fouling. The leaching process is chemically controlled ensuring that biocide is released throughout the season, however the amount of biocide released will steadily decline. The benefit of hard antifouling is its resistance to abrasion and rubbing and this makes it ideal for fast powerboats, racing yachts, or boats that are cleaned regularly. Most hard antifoulings can be wet sanded and burnished prior to launch to reduce drag and improve hull speed.