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Antifouling Sea-Line versus fouling

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Antifouling Sea-Line versus fouling

„I used Antifouling Sea-Line two seasons ago (in 2014). Before the beginning of the 2015 season, I painted the wooden rudder, ,,newly secured” with Le Tenkinios, a natural oil varnish, with Antifouling Sea-Line (in two layers). The remaining paint was used on the hulk and – to my surprise – I did not find any difference in the quality of  antifouling security compared to the one made the year before. Similarly surprised was the boatswain who every single day launches yachts at my marina. He stated that many yachts were covered with shells but he did not find anything at my Ka-Haar. Making preparations for wintering, I cleaned the whole yacht therefore in the pictures there are white damp patches visible, the remains of the gelcoat cleaner.


After the two seasons I can confidently say that:

Antifouling Sea-Line versus fouling at Zalew Szczeciński, the score is 2:0.

The third round „Antifouling Sea-Line versus fouling at Zalew Szczeciński” begins in just three months. My plan of the winter renovation works at the bottom includes securing minor mechanical damages, from the bottom and the rudder (max. 10 cm2), with antifouling paint. Instead of working hard at the renovation of antifouling surface, I will devote my winter evenings to reminiscing this year’s cruises.”

October 2015, text and pictures by Piotr6 (www.sailforum.pl)


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Our FAQ
Answers to frequently asked questions

Can I paint the bottom of the boat with polyurethane paint?

Yes, you can paint the bottom of the boat with polyurethane paint due to its high mechanical strength. We recommend this solution when the boat is not launched for a long time and is not exposed to fouling.

Why does the paint have no adhesion?

Possible causes

  • Wrong surface preparation,
  • Skipping the primer in the system application process,
  • Use of universal thinners or replacements ,
  • Paint incompatibility.

How to prevent

  • Correct surface preparation (grinding, clearing, degreasing),
  • Use primers which improve adhesion of paints,
  • Use thinners which are dedicated to each paints,
  • Use of paints which are compatible to each other.

How to remove

  • Grind, clean and paint again.

Why did the polyurethane topcoat become dull?

Possible causes

  • Too short time for evaporation of the thinner,

How to prevent

  • Maintain the right conditions for complete evaporation of the thinner,

How to remove

  • Mat the surface, degrease and apply the paint according to the rule (right conditions and thinning proportions)
  • Polish surface if needed.
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