Osmosis and GRP repair
Osmosis can be treated: gelcoat removed, hull dried, epoxy barrier coat
Survey, blasting, drying, laminating and epoxy barrier coat. The boat leaves watertight.
- Drying varies
- Treatmentcurative or preventive
- 1 checkat every haul-out
What osmosis treatment includes
1. Survey
Hull moisture readings.
2. Blasting
The porous gelcoat is removed.
3. Drying
From a few weeks to several months.
4. Epoxy and antifouling
The hull is sealed and protected.
Hulls stripped bare, then sealed again
Gelcoat removed, the hull dries before treatment. 
Laminate checked under the hull. 
Epoxy barrier coat, clean line at the waterline. 
Gelcoat peeled before drying.
The price depends on
Area to treat
The whole bottom or one area.
Blister depth
Laminate affected or not.
Finish
Gelcoat, paint or antifouling.
Two questions about this service
How do I know if my boat has osmosis?
Blisters under the antifouling. We take moisture readings at haul-out.
Does osmosis come back?
Not with a properly applied epoxy barrier coat.
How much does osmosis treatment cost in Tunisia?
It depends on the underwater area, how deep the blisters go and the drying time. We measure the hull's moisture before quoting; the haul-out and the space ashore are charged separately at the port's rate.
Often requested with this service
Describe your boat on WhatsApp and get a quick quote
No visit needed, no commitment. By WhatsApp or by phone.