Testing Tomorrow’s Antifouling: The Ecoating Application on Anna Katharina
At the beginning of September 2025, the Norwegian fishing vessel Anna Katharina was hauled ashore at Kvitsøy for a comprehensive hull treatment. As part of the ongoing SEAGLOW project, the vessel was selected to trial an innovative antifouling technology intended to enhance durability and reduce environmental impact.
The work was undertaken at Ymas Båt & Maskin, with several local contractors contributing their expertise. The objective was to remove all old paint layers and rebuild the hull protection from the bare substrate upwards. This included the application of International’s VCTar2 epoxy primer, followed by SEAGLOW consortium partner Clean Ocean Coatings’ Ecoating – a two-component foul release coating system incorporating nano-particles within a polymer matrix.
Surface preparation
On 1 September, Anna Katharina was slipped from the water and subjected to high-pressure washing to remove marine growth and surface fouling. The following day, Haugaland Blåseservice carried out a full sandblasting of the hull, effectively removing all previous coatings down to the original gelcoat. With the substrate exposed, minor repairs were made to the gelcoat to restore integrity and ensure a smooth surface.
Subsequent preparation involved thorough sanding and cleaning to promote optimal adhesion for the new primer. This careful groundwork is essential to the long-term performance of any coating system, and laid the foundation for the subsequent application stages.
Primer application: VCTar2
Once surface preparation was complete, the primer system was applied. A total of five layers of International VCTar2 were applied by roller, with appropriate curing intervals between each layer. VCTar2 is a two component epoxy-based primer designed to protect against water ingress and osmosis, providing a robust and impermeable foundation for the topcoat.
The result was a uniform, well-sealed surface, ensuring both protection and adhesion for the final antifouling coating.
Antifouling application: Ecoating
With the primer fully cured, preparations began for the application of the Ecoating system. The hull above the waterline was carefully masked with protective sheeting, and a Graco XP70 plural-component spray unit was installed.
Ecoating is a two-component foul-release product comprising a polymer matrix reinforced with nano-particles. It is designed to deliver extended service intervals compared with conventional self-polishing or ablative coatings. The system combines the hardness and smoothness of ceramics with the flexibility of polymers, producing a durable, easy-to-clean surface.
Some initial challenges arose in sourcing personnel with experience in operating the Graco XP70 spray equipment and applying the two-component system. However, with assistance from Norspray in Stavanger, the application was successfully completed. Two layers of Clean Ocean Coatings’ red Ecoating were applied evenly across the hull, resulting in a smooth, consistent finish.
A key advantage of Ecoating is its reduced environmental impact. Unlike traditional antifouling systems, which rely heavily on release of biocides and microplastic, Ecoating has no leaching into the marine environment. Its hard,non-porous surface is intended to resist fouling and can be cleaned mechanically without abrasion or degrading the coating. Additionally, the smooth surface enables the so-called foul release effect – with enough speed of the boat, the fouling will fall off due to the hydrodynamic shear forces.
Initial results
Following application, the coating was allowed to cure, with minor roller touch-ups carried out as required. By the end of the week, Anna Katharina was relaunched and returned to service.
The vessel presented an excellent visual result, with a bright and uniform hull finish. After several weeks of operation at sea, early impressions are positive. Nevertheless, the long-term performance of Ecoating under operational conditions will be monitored closely to assess its durability, fouling resistance, and cleaning characteristics.
Conclusion
The hull treatment of Anna Katharina successfully combined a convential two component epoxy primer system with an advanced, spray-applied foul-release technology. The project demonstrates that two-component systems such as Ecoating can be effectively applied to smaller vessels within the fishing fleet, expanding the scope of sustainable hull protection technologies.
If long-term performance data confirm the anticipated benefits – including improved durability, reduced maintenance requirements, and a lower environmental footprint – Ecoating may represent a significant advancement over conventional self polishing antifouling paints.
Photos @Seaglow






