Hull Fouling Has Been Solved.
SEA-SPEED V 10 X ULTRA is the hard-film silane-siloxane foul-release coating SepcoTech supplies and supports across the Baltic region and Norway. One application gives a decade of glass-smooth, biocide-free performance — releasing fouling through surface chemistry alone, cutting fuel and emissions, and paying for itself many times over. No copper. No biocides. No re-coating for ten years.
Everything you assume about hull coatings is being rewritten
SEA-SPEED is not a better antifouling — it is a different physics. Three assumptions fall away.
→ Surface chemistry, not poison
SEA-SPEED releases fouling through an ultra-low-energy, nano-smooth surface — no TBT, copper or zinc, and nothing leached into the water. Barnacles wipe off by hand even after 18 weeks of static immersion.
→ Non-depleting, never consumed
The hard film does not ablate or polish away. Unlimited in-water grooming restores the surface — 1,000+ underwater cleans without film loss or toxic release — so the hull stays smooth, not slowly eaten away.
→ One application. Ten years.
A single application carries a 10-year warranted system life. Instead of recoating each docking, you groom, inspect and keep sailing — slashing through-life coating cost and dry-dock time.
The only hard-film silane-siloxane foul-release coating
A glass-hard yet flexible film engineered to hold its smoothness for a decade.
- Hard-film silane-siloxane chemistry — foul-release, not antifouling
- Average surface roughness under 5 µm per manufacturer TDS — nano-smooth, glass-hard finish
- Pencil hardness 6H — glass-hard yet flexible, so it resists cracking and delamination
- Hard, abrasion-resistant film (ASTM D4060) — extremely hard yet flexible, holds its smoothness
- Non-depleting, non-ablative — the film is never consumed
- 1,000+ underwater cleans without film loss or toxic release
- 95% solids by volume — minimal VOC; safe for applicators and yard workers
- Proven durable — 6,000 h salt-fog (ASTM B117) and 13,200 h QUV (ASTM D4587)
- Zero biocides — no TBT, copper or zinc; zero regulatory exposure
- Supplied as a two-part kit (Activator + Base Resin) — 1 US gal (3.785 L) & 5 US gal (18.925 L)
Manufacturer documentation:
Technical Data Sheet (PDF) ·
Safety Data Sheet — Part A (PDF)
Seacoat SCT, LLC. SDS Part B (Base Resin) available on request.
The hull pays for the coating
Four headline numbers from SepcoTech's performance model for a representative vessel. The line-item breakdown, the three pools of value, the regulatory and CII case and our evaluation framework all live on one page — so you can send it upstairs unedited.
Illustrative model figures — actual returns depend on vessel type, operating profile, fuel price and route. We run a tailored analysis on your vessel particulars.
Verified operator data
Fuel and CII results measured by operators in service, by vessel type.
| Vessel type | Speed band | Measured result |
|---|---|---|
| Ro-Ro / Container | 15–21 knots | 3.0–7.3% fuel saving · CII improved ~17% |
| Product Tanker | service speed | 7.1–9.1%+ fuel saving |
| Container Feeder (×2) | 13–14 knots | 8.5% fuel saving |
| Research Vessel | 13–14 knots | 8.6% fuel saving |
| Expedition Cruise Ship | — | +10% speed |
| Sportfisher (owner trial) | cruise / top end | 13.5 L/hr saved at cruise · +8 knots top end |
Surface roughness drives the gain: SEA-SPEED measures <10–16 µm out of dock, against 120–175 µm for conventional antifouling and 70–90 µm for soft silicones — and fuel changes by roughly 1% per 20 µm. On the owner's sportfisher, light fouling self-cleaned within a day of running.
A faster hull is a cleaner hull
Lower hull friction means less power for the same speed — less fuel, fewer emissions, and a better EEXI and annual CII rating. SEA-SPEED delivers the efficiency case and the environmental case at once: zero biocides at the waterline, and thousands of tonnes of CO₂ kept out of the air over the coating's life.
Zero biocides — on a tightening regulatory horizon
Copper- and zinc-based antifoulings are under active review in the EU, the US and the Pacific. On a 10-year hull horizon, that is a planning assumption — not a remote risk.
Measured on real ships, by the people running them
“We are seeing a 2–3% decrease in consumption at 21 knots and a 5–7% improvement at 15–17 knots.”
Joey HalversonTOTE Services LLC · December 2022“+10% speed” on an expedition cruise hull — the kind of margin that resets a vessel's schedule and fuel bill.
HurtigrutenExpedition cruise operatorHSC Francisco — the world's fastest high-speed ferry at around 50 knots — has run the Buenos Aires–Montevideo route for three years, accumulating 360,000+ nautical miles with no repaint and no measurable decay in speed or fuel performance.
Gerardo BabiniTechnical Office, BUQUEBUSIndependent measurement found below-10-micron out-of-dock surface roughness, projecting a minimum 5–6% fuel-consumption gain over traditional coatings — a smoother hull that directly improves both EEXI and annual CII.
Juha HanhinenIndependent naval architectFrom commercial fleets to cruise, high-speed and naval craft
SEA-SPEED scales across hull types — anywhere drag, fuel and time off-station matter.
Commercial Shipping
Tankers, bulkers, container ships and Ro-Ro — where a fraction of a knot and a CII band are real money.
Cruise & Expedition
A green, in-water-cleanable hull for operators under public scrutiny on emissions — Hurtigruten, Holland America, Royal Caribbean.
High-Speed Craft
Fast ferries and catamarans — INCAT, Buquebus — where surface smoothness translates straight into speed and fuel.
Naval & Defence
The US Navy's foul-release coating of choice since 2001, and on UK Royal Navy Type 26 frigates. Also in SepcoTech's Defence category.
400+ vessels. Lloyd's Register certified.
SEA-SPEED V 10 X ULTRA is Lloyd's Register certified (Report LR2514761AF-02) and in service worldwide across navies and commercial fleets.
SEA-SPEED on the hull — and in the water
Brand references and independent static-immersion tests of the foul-release film, straight from the manufacturer's channel.
SEA-SPEED — FAQ
Is SEA-SPEED an antifouling paint?
How much fuel can it save?
What is the return on investment?
How long does it last?
Is it certified and proven?
Who supplies it, and where?
Get a tailored SEA-SPEED performance analysis
Send your vessel particulars and we'll model the fuel, emissions and ROI for your hull — and prepare a quotation.
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