Marine Coating Application
A good coating is half the spec and half the application. Here's where marine coatings are heading, why airless spraying gives the best result on board, and how to pick the right sprayer for the job.
Where marine coatings are heading
Two trends shape what you'll be spraying. The first is the rise of high-performance anti-corrosion coatings, a market growing at around 4.8% a year toward roughly US$18 billion, because these coatings protect substrates that sit in some of the harshest corrosive conditions there are. Epoxies still dominate (over half the market), while acrylics are the fastest-growing segment, and newer nanotechnology finishes fill the microscopic pits and cracks present in even a new hull, leaving a smoother surface that resists algal growth, exhaust marks and oily streaks, and shrugs off UV.
The second is coatings for sub-zero service. In polar conditions temperatures fall well below −50 °C, and specialist hull coatings keep a vessel's speed in ice and cut fuel consumption by reducing hull roughness. Either way the common thread is the same: the performance is engineered into the coating, and you only get it if the film is applied to the right thickness, evenly.
Why airless spraying wins on board
These are thick, high-solids products over large areas: exactly what airless spraying is built for. It atomises the coating under hydraulic pressure without adding air, so it lays down a heavy, even film fast, drives material into welds and pits, and wastes less than air spray. For a hull, a tank or a cargo hold, that speed and consistent build is the difference between a coating that meets its spec life and one that doesn't.
Match the sprayer to the job
Scale and power source decide the machine, from a spot touch-up to a full cargo hold.
| Job | Recommended sprayer | Power |
|---|---|---|
| Spot repair & small jobs | Merkur, President / Monark, or Classic 390 / ST Max | Pneumatic or electric |
| Large areas & cargo holds | King (high-output) or e-Xtreme | Pneumatic or electric |
| Hazardous (ATEX) areas | ATEX-approved sprayers, e.g. e-Xtreme | Electric, hazardous-location |
| Finish & reach | Right gun, RAC X tip, hose length & pole extension | Accessory choice |
One family, spot repair to hold-scale
- Spot repair & small jobs: compact pneumatic units like Merkur or President / Monark, or an electric Classic 390 / ST Max where mains power is handy.
- Large areas & cargo holds: high-output King pneumatic airless, or the electric e-Xtreme for heavy protective coatings.
- Hazardous (ATEX) areas: use the ATEX-approved sprayers; don't compromise on a classified deck or hold.
- Finish & reach: the right gun, RAC X tip size, hose length and pole extension matter as much as the pump.
Don't skip the surface prep
Even the best coating fails on a poor surface. Profiling and cleaning come first: vapour-abrasive blasting and grinding give the anchor pattern the coating needs. That's covered in our surface preparation range and the ATEX-zone cleaning guide.
The equipment for this job
Graco's airless range runs from Merkur and President for small work up to King and the electric e-Xtreme for hold-scale coating, plus guns, RAC X tips, hoses and extensions.
Coating sprayers → Surface prep → All products →
Prefer to talk? Call (+45) 6916 2400 or email tech@sepcotech.com — or send your ShipServ RFQ to TN 317545.
Coating-trend figures and themes drawn from Graco's marine coatings round-up. Original source: graco.com: Coatings for the marine industry. SepcoTech supplies the Graco marine range against ShipServ TN 317545.