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Antifouling Paints

Antifouling paints are specialised marine coatings designed to protect the hull from algae, barnacles and marine growth. Their primary function is to limit biological fouling below the waterline, preserving hydrodynamic efficiency and helping maintain consistent fuel consumption.

The correct selection of antifouling depends on hull type, vessel speed and time spent in the water. Choosing the appropriate product reduces unplanned maintenance and supports long-term performance stability.

Technical guidance: types, selection and application

What they are
Antifouling coatings are underwater paints containing active agents that inhibit the attachment and growth of marine organisms. They are applied exclusively to submerged areas and serve a functional, not decorative, purpose.

Main types

  • Self-polishing antifouling: gradually releases active substances while the surface renews through controlled wear.
  • Hard matrix antifouling: forms a more abrasion-resistant film, suitable for faster boats or frequent hull cleaning.
  • Soft matrix antifouling: recommended for seasonal use or vessels with extended periods in the water.

Difference compared to other marine coatings
Unlike primers or topcoats, antifouling paints do not provide structural sealing or aesthetic finishing. They do not replace epoxy barrier systems or anticorrosive treatments, but act as the final protective layer specifically against marine growth.

Practical application

  • Apply on a properly prepared and compatible substrate
  • Respect manufacturer overcoating and launch times
  • Select colour also considering wear visibility

A correctly applied antifouling system reduces drag, improves hull smoothness and contributes to lower fuel consumption.

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