Flawless Marine Painting | Compressed Air Treatment for Boats and Boatyards

Marine and Shipbuilding

Boatyards are among the settings where treated compressed air delivers the most immediate, measurable benefits. The Evans system adapts to boat sheds, mid-to-large yards and industrial shipyards: from a single spray line to painting hulls and interiors of every size.

Untreated compressed air changes behavior throughout the day: humidity, temperature and static charge affect every stage of application. With the Evans system these factors are neutralized upstream: filtered, heated and deionized air, used with air-assisted and airmix guns, always guarantees the same viscosity and the same product yield, regardless of the hour or the season.
The result shows on the edges, on flat surfaces, in color uniformity, in the blending. Fewer touch-ups caused by dust specks, less product wasted, less downtime for defects, lower rework costs.

When it comes to a perfect finish, compressed air quality makes the difference. Our deionization system removes dust, moisture and electrostatic charge: every application comes out uniform, smooth, defect-free, immaculate and long-lasting.

WHY TREAT COMPRESSED AIR

The risks of untreated air in the boatyard

Constant humidity in a marine environment

Coastal air keeps relative humidity between 70–90%. Condensation in the compressed air line creates micro-porosity in the gelcoat: the entry points for osmosis.

Oil in the epoxy primer

Traces of oil prevent the antifouling from adhering. The result is an underwater coating that peels off mid-season: early haul-out, bottom to redo, weeks of yard time lost, an unhappy customer.

Unstable pressure on long hulls

Painting a hull of 8–15 m and up requires steady, consistent air delivery. A drop halfway through a pass leaves a visible joint line: sanding, a blending coat, a final coat. Three extra days.

THE EVANS SYSTEM ADVANTAGE

Perfect air for every boatyard

Osmosis-free gelcoat

Dry air eliminates the micro-porosity that triggers hull blistering.

Antifouling that lasts

A contamination-free epoxy primer ensures optimal adhesion of the underwater paint.

Fewer unscheduled haul-outs

Fewer defects = no early returns to the yard. Every extra haul-out costs hundreds of euros in slot fees.

Efficient in coastal environments

Dehumidification designed for a constant 70–90% relative humidity, not just seasonal peaks.

Less downtime

Scheduled maintenance, no sudden shutdowns from condensation.

2K cycles done right

Stable pressure ensures correct atomization of two-component polyurethane paints.

CUSTOM SOLUTIONS

Every boatyard is different. Evans adapts.

From a small boat shed to an industrial shipyard, Evans sizes the air treatment system based on the required flow rate and the environmental conditions of the yard.

Site survey, sizing, installation and testing included.

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Small boatyard

Boat storage and private refitting. Compact installation on your existing compressor.

Mid-size boatyard

Professional production and refitting. Modular system for multiple painting stations.

Industrial shipyard

Heavy shipbuilding and superyachts. Centralized system with remote monitoring.

FAQ

Frequently asked questions about marine painting

Why is compressed air critical in a boatyard?

In a boatyard, humidity exceeds 70% all year round and the damage is structural: micro-porosity in the gelcoat that triggers osmosis. The materials (epoxies, antifouling, 2K polyurethanes) are far more expensive: one mistake on the bottom costs days of yard time.

How does Evans-treated air protect the hull from osmosis?

Osmosis starts when water penetrates the laminate through micro-porosity in the gelcoat. This micro-porosity forms during application when the compressed air contains condensation: micro-droplets trapped beneath the protective layer. An Evans system removes condensation upstream, ensuring a compact, watertight gelcoat from the very first cycle.

Are Evans systems compatible with epoxy primers and antifouling?

Yes. Evans systems are compatible with all major marine coating cycles: epoxy primer, self-polishing and biocide antifouling, and 2K polyurethane topside enamels. Treated air improves primer adhesion and ensures the antifouling bonds properly to the layer beneath.

Can the system be adapted to boatyards that already have an air system?

Yes. The Evans system connects to the existing air network without replacing the compressor. Site survey, sizing and installation are included: the yard keeps running.

How long does installation take without stopping boatyard operations?

For most boatyards, installation takes 1–2 working days at most, and in some cases just a few hours. The system connects to the existing air line without structural work. Painting can resume the same day.

Do Evans systems work with the 2K polyurethane paints used in refitting?

Yes. 2K paints such as Awlgrip, Toplac and Jotun Hardtop require stable pressure and clean air for proper atomization. The Evans system ensures optimal conditions for every finish, from deck to interiors. Constant pressure eliminates the fluctuations that cause color differences between adjacent passes.

Flawless marine painting: treated compressed air for boatyards