Is It Wise to Use Antifouling Paint for Yacht Maintenance?
Antifouling paint, used in yacht maintenance for years, is being replaced by ultrasonic antifouling systems. But is antifouling paint still a sensible choice?
3 min read
Published: July 8, 2025
Every season, we see the same scene at marinas. Thick layers of copper-based paints, strong solvent smells, and boat owners wearing masks. Is antifouling paint, applied to keep biofouling off the hull and reduce fuel consumption, still the most sensible choice?
Regulations, legal issues, and high costs are increasing while nature’s tolerance is wearing thin. Let’s examine the pros and cons of antifouling paint together and decide.
What Has Changed in Antifouling Paints Over Time?
For centuries, antifouling paints have been used by mariners. Hulls were coated with copper to keep mussels and biofouling away. In the 1960s, organotin (TBT) compounds emerged as the “miracle paint.” But shortly after, antifouling metal leaching devastated marine life in ports.
IMO AFS 2001 Convention and TBT Bans
The International Maritime Organization adopted the AFS Convention in 2001, globally banning TBT. Even large ships today cannot use organotin.
The European Union will set strict limits on copper leaching from hulls by 2025. By 2028, copper-based paints will become more costly in many marinas. Draft regulations are already being discussed in Turkey, signaling the need for alternative plans.
The first priority for your boat should be switching to ultrasonic antifouling systems. This step prepares you for upcoming regulations. Learn how it works here.
Advantages of Antifouling Paint
Despite its environmental harm, antifouling paint still has advantages.
Wide Availability
Almost every marina sells copper-based antifouling. Nearly all professionals are familiar with this maintenance method. A barrel of paint and labor often looks cheaper than alternatives.
Low Initial Cost
Antifouling paint has a low upfront application cost, which can seem like an advantage. But in the long run, increased fuel consumption and temporary protection mean it only saves money initially.
Disadvantages of Antifouling Paint
A few advantages pale compared to many disadvantages that make antifouling paint illogical.
Antifouling Metal Leaching and Marina Sediment Pollution
Copper levels in sediments at busy marinas can be nearly 10 times natural levels. These sediments kill fish and eggs, disrupt plankton chains, and ultimately degrade marine ecosystems.
Human Health and VOC Exposure
Antifouling paint releases VOCs as it cures. These cause headaches, respiratory irritation, and long-term cancer risks. Copper dust from paint removal and sanding irritates skin and eyes.
If you want clean water where you swim, antifouling paint use makes little sense.
Legal Risks and Potential Fines
Boats exceeding copper limits are likely to be fined in Europe. Similar regulations are expected soon in Turkey. Continuing antifouling paint use will be a stressful legal risk.
Eco-Friendly Alternatives
You don’t have to rely on antifouling paint to keep your boat clean. Eco-friendly ultrasonic antifouling systems let you protect both your boat and the sea.
How Does Marisonia Work?
Marisonia is installed on your hull within 3-4 hours. After installation, it emits low-frequency vibrations that break biofilm walls and prevent barnacle attachment. It only consumes about 6W of power—equivalent to a single light bulb.
Switch to Marisonia
What do you expect from your boat?
Marisonia delivers all this. Discover it now and take the first step. Choose what’s sensible!
