Europe Restricts Shipowner Hull Coating Choices: New Environmental Rules
The European Commission has adopted new restrictions on biocidal antifouling hull coatings under the EU Biocidal Products Regulation, effective from January 2028. The restrictions limit the use of copper-based and cybutryne-containing antifouling paints on vessels calling at EU ports, citing evidence of accumulated toxicity in harbour sediments and coastal ecosystems. The regulation affects all vessels over 400 gross tonnage entering EU territorial waters, regardless of flag state, and will force widespread reassessment of hull maintenance strategies across the global fleet.
What Coatings Are Being Restricted?
The primary targets are copper-based antifouling coatings, which have been the industry standard for biofouling prevention since the global ban on tributyltin (TBT) took effect in 2008. Copper-based paints work by leaching copper ions into the surrounding water, creating a toxic boundary layer that prevents marine organisms from attaching to the hull. While effective, decades of copper leaching in busy port environments have produced measurable copper accumulation in harbour sediments and adjacent marine ecosystems.
The EU restrictions do not impose an outright ban on copper antifouling but establish maximum copper leaching rate limits that will effectively prohibit the most aggressive copper-based formulations. Cybutryne, a booster biocide used in some high-performance antifouling systems, faces a complete prohibition following the IMO's addition of cybutryne controls to the International Convention on the Control of Harmful Anti-fouling Systems.
What Are the Alternative Technologies?
Shipowners must evaluate several alternative antifouling approaches, each with distinct performance, cost, and operational characteristics.
Silicone-based foul-release coatings. These non-toxic coatings create an ultra-smooth, low-friction surface that prevents organism attachment through physical rather than chemical mechanisms. Foul-release coatings have been commercially available for over a decade and are used extensively on high-speed vessels and LNG carriers. However, their effectiveness diminishes at low vessel speeds, making them less suitable for vessels that spend extended periods at anchor or in port.
Ultrasonic antifouling systems. Hull-mounted ultrasonic transducers generate acoustic vibrations that disrupt biofilm formation on the hull surface. These systems are chemical-free and have shown promising results in niche applications, but their effectiveness on large commercial vessel hulls remains unproven at scale.
Robotic hull cleaning. Remotely operated or autonomous underwater hull cleaning robots can maintain hull cleanliness through regular mechanical cleaning, reducing the need for biocidal coatings. Companies including Jotun (with its HullSkater system), ECOsubsea, and Fleet Cleaner are commercialising hull cleaning robotics. The approach shifts the antifouling strategy from chemical prevention to mechanical maintenance.
Hard coating systems with regular cleaning. Epoxy-based hard coatings combined with scheduled in-water cleaning offer a non-biocidal approach. This requires access to in-water hull cleaning services at regular intervals — typically every 60 to 90 days — which introduces scheduling constraints and port service dependencies.
What Are the Cost Implications for Shipowners?
The transition away from high-performance copper antifouling coatings carries direct and indirect cost implications. Foul-release coating systems typically cost 30 to 50 percent more than conventional copper paints on a per-application basis, though they can deliver fuel savings of 3 to 8 percent through reduced hull friction.
However, the primary cost concern is the risk of biofouling-related performance degradation. A vessel with inadequate antifouling protection can experience fuel consumption increases of 10 to 40 percent due to hull roughness, depending on the severity of fouling. For a large container vessel consuming $30,000 to $50,000 per day in fuel, even moderate fouling represents a significant economic penalty.
How Do These Rules Affect Port Operations?
The EU coating restrictions will increase demand for in-water hull inspection and cleaning services at European ports. Port authorities will need to accommodate hull cleaning operations within their harbour management frameworks, including environmental containment requirements for debris and biological material removed during cleaning.
Drydocking demand may also increase as vessel operators schedule coating changes during routine maintenance periods. European drydock capacity, already tightly utilised, may face additional pressure during the 2027-2028 transition period.
Conclusion
Europe's new hull coating restrictions represent the next phase of maritime environmental regulation, extending from emissions and ballast water to the chemical interface between vessel and ocean. Shipowners have a two-year window to evaluate alternative antifouling technologies and adjust maintenance strategies. The operational and cost implications are significant, but the regulatory direction is clear — and the transition will create new demand for hull maintenance services, inspection technologies, and port-based cleaning infrastructure across European waters.