I · Underwater Hull & Protection
Polyester osmosis repair
A complete osmosis treatment: removing the affected layer, drying, repairing and applying a new waterproof barrier to the hull.
01 The service
Osmosis occurs when moisture penetrates the polyester laminate and causes the typical blisters beneath the gel coat. Left untreated, it progresses and affects the strength and value of the boat.
A proper repair is not cosmetic. It requires removing the affected material, drying the hull fully under moisture monitoring and rebuilding the surface with epoxy systems.
02 How we work
The process, step by step.
- 01
Moisture readings and mapping of the affected areas
- 02
Removal of gel coat and affected layers
- 03
Washing and drying with regular readings
- 04
Laminate repair and fairing with epoxy materials
- 05
Anti-osmosis barrier and antifouling
03 From the workshop
See the work in action.
03 FAQ
Your most common questions.
How can I tell if my boat has osmosis?
The most common sign is small blisters below the waterline, which often release an acidic-smelling liquid when burst. A reliable diagnosis needs an inspection and moisture readings.
How long does the repair take?
It depends mainly on how long the laminate takes to dry — anything from a few weeks to several months. After the inspection we give you a realistic timeline.
Hull sandblasting
Removing old antifouling layers and growth down to a clean substrate — the right foundation for every protective system that follows.
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Anti-osmosis protection
An epoxy barrier system that seals the hull and protects it from moisture ingress — on new or repaired boats.
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Antifouling application
Choosing and applying the right antifouling for your waters and your use of the boat — for a clean hull and lower fuel consumption.
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Copper Coat application
An epoxy resin with a high copper content that protects the underwater hull for many seasons — without yearly antifouling.
Learn more
Let's talk about your boat.
Tell us what you need and we will get back to you to arrange an inspection and a quote.