The world's shipping fleet is a floating experiment in applied chemistry, its hulls coated with paints designed to poison anything that tries to grow on them. The problem is the poison doesn't stay put. For Berlin's Clean Ocean Coatings, the answer isn't a better biocide, but a surface so smooth and hard that barnacles can't get a grip in the first place.
Founded in 2020 by CEO Christina Linke and materials scientist Patricia Griem, the startup is commercializing a coating it calls Ecoating. It's a solvent-free, biocide-free hard paint based on a polymer-nanoparticle matrix called Polyramik, a technology Griem began developing over a decade ago [adlershof.de, 2026]. The pitch is straightforward: a ship with a clean hull uses less fuel. A ship with a hull coated in a paint that doesn't slough off microplastics or leach toxins doesn't contribute to ocean pollution. The unit economics, they argue, should speak for themselves.
The wedge of a hard, cleanable surface
Most commercial antifouling paints today are self-polishing copolymer (SPC) coatings. They contain biocides that slowly leach out, creating a toxic boundary layer that discourages growth. They also, by design, erode over time, shedding microplastics and requiring reapplication every few years. Clean Ocean Coatings' alternative is a permanent, glass-like finish. Fouling that does occur,and some always will,is meant to be removed mechanically, via brushing or water jetting during regular dry-dock maintenance, without damaging the coating itself. The company claims this approach offers up to three times longer durability than conventional paints while requiring half the number of paint layers during application [adlershof.de, 2026].
For a ship operator, the calculation shifts from the cost of paint and regulatory compliance to the cost of fuel and cleaning. A 1% increase in hull roughness from fouling can increase fuel consumption by around 2%. Over a year, for a large container ship, that can mean millions of dollars in extra fuel and thousands of tons of avoidable CO2. A coating that stays smoother for longer, without the looming regulatory scrutiny on biocides like copper, presents a compelling, if unproven at scale, trade-off.
Traction on the water
The company is moving from lab to pilot. Its first paid project coated the research catamaran Limanda in partnership with Universität Rostock [cleanoceancoatings.com, 2024]. More significantly, it has progressed to testing on commercial vessels. According to a 2026 profile, four freight ships are currently operating with test areas coated with Ecoating, alongside one sailboat and the Limanda [adlershof.de, 2026]. This is the critical, early evidence that shipowners,a notoriously conservative buyer group,are willing to allocate a small patch of hull real estate to an unproven product.
The team behind the technology leans heavily on its scientific pedigree. Linke holds a PhD in food technology, while Griem led the original coating concept development at materials firm Phi-Stone AG. The intellectual property was transferred to Clean Ocean Coatings following a meeting facilitated by STARTHUB VENTURES approximately four years ago, capping over a decade of prior research [LinkedIn: Sascha Schubert, 2026]. The company lists 2-10 employees [LinkedIn, 2024] and has attracted individual investors like Ferdinand Mühlhäuser, though it has not disclosed institutional funding rounds.
The incumbent to beat
Clean Ocean Coatings is not the only company looking beyond toxic paints. The competitive landscape includes both novel entrants and established giants exploring alternatives.
| Company | Approach | Key Differentiator |
|---|---|---|
| Clean Ocean Coatings | Biocide-free hard coating | Permanent, smooth Polyramik surface; mechanically cleanable |
| Finsulate | Adhesive foil with fiber texture | Physical barrier; no curing time |
| I-Tech (Subsidiary of I-Tech AB) | Silicone-based foul-release coatings | Slippery surface; fouling releases under water flow |
| Hempel (Incumbent) | Broad portfolio including SPC & silicone coatings | Global sales & service network; R&D scale |
The most direct comparison is to foul-release silicone coatings, like those from I-Tech or offered by majors like Hempel. These create a slippery surface from which organisms detach easily, often while the ship is underway. They are also biocide-free. Clean Ocean Coatings argues its hard coating is more durable and resistant to mechanical damage during cleaning or accidental impacts,a claim that will need to be validated in multi-year, real-world trials.
Where the bet gets hard
The risks here are material, in every sense. Shipping is a brutal environment, and a coating failure is catastrophic for a vessel's operational schedule. Convincing a captain or fleet manager to bet on an untested Berlin startup over a known supplier like Hempel requires overcoming immense inertia. The sales cycle is long, tied to dry-docking schedules that occur only every two to five years. Furthermore, the company's claims of threefold durability and fuel savings remain just that,claims,until independently verified by a major classification society or a large, public-facing fleet operator.
Financing the jump from test patches to full hull treatments on a dozen ships will require capital. The lack of a disclosed institutional round suggests the company is still in the proving-early-traction phase with angel backing. The next step is likely a seed round to build out a commercial team and fund more extensive pilot programs with name-brand shipping lines.
For a mid-sized container ship, fuel can account for 50-60% of total operating costs. If a coating can reliably deliver even a 2% net fuel saving after accounting for any increased cleaning costs, the payback period is measured in months, not years. That's the math Clean Ocean Coatings is banking on. To win, it doesn't need to rework marine coatings overnight. It needs to prove its numbers are real, ship by ship, and then outlast the regulatory pressure slowly squeezing its toxic competitors. The incumbent it must beat isn't just another startup; it's the entire, entrenched supply chain of copper-based paints that has dominated shipping for decades.
Sources
- [cleanoceancoatings.com, 2024] Clean Ocean Coatings website | https://www.cleanoceancoatings.com/
- [LinkedIn, 2024] Clean Ocean Coatings GmbH company page | https://de.linkedin.com/company/cleanoceancoatings
- [cleanoceancoatings.com, Aug 2023] Why Clean Ocean Coatings? An interview with our CEO | https://www.cleanoceancoatings.com/blog-posts-en/why-clean-ocean-coatings-an-interview-with-our-ceo-christina-linke
- [cleanoceancoatings.com, 2024] Nachhaltige Innovation auf dem Wasser - unser erstes Pilotprojekt | https://www.cleanoceancoatings.com/postwww-cleanoceancoatings-com-post-blog-post-page/nachhaltige-innovation-auf-dem-wasser-unser-erstes-pilotprojekt-mit-dem-forschungskatamaran-limanda
- [adlershof.de, 2026] Cleaner coatings for ships | https://www.adlershof.de/en/news/cleaner-coatings-for-ships
- [LinkedIn: Sascha Schubert, 2026] Post on IP transfer | https://www.linkedin.com/in/saschaschubert/