Leisure Yachts

There are many different types of antifouling in the market and they may be divided into two main groups; selfpolishing and hard:

In order to choose the correct antifouling for your boat and usage, it is important to consider type of boat, usage frequency, geographic location, current antifouling, and whether the boat is frequently transported by trailer. Also keep in mind environmental aspects and local regulations.

On top of new substrates or completely paint free hulls

On top of existing antifoling in good condition

Preventing fouling is not just a question of the antifouing itself, but also the application and thickness of each coat. It is important to have enough paint for the surface to be painted, in order to achieve the correct protection.

On top of new substrate or totally sanded/blasted surface:

On top of new substrate or totally sanded/blasted surface:

1. One thick coat with primer may be accepted but be aware that this may result in an uneven surface, affecting the final finish.
2. Xtreme Gloss may be applied on both XPrimer and Antipest, but for best result use XPrimer. EasyGloss should only be applied on top of EasyPrimer.
3. EasyPrimer and Easygloss should only be used above the waterline.
   

Osmoshell is a solvent-free epoxy coating, reinforced with glass flakes, giving a very high structural surface, being virtually waterproof. This is a curative coating system for hulls affected by osmosis. 

Recommended painting process for an osmosis treatment of a fibre glass hull:

Small osmosis damage may be repaired with Epoxy Repair.

(*) If abrasive material cannot be used, coarse sanding with P40 – P80 dry paper is recommended in order to ensure the correct surface roughness and full adherence of the system. 
(**) Finishing Filler is recommended to obtain a smooth surface, as Osmoshell will leave certain roughness after application and should not be sanded to avoid film thickness reduction. Finishing Filler can be easily sanded to get a smooth surface.
Moisture content of the hull has to be less than 1% before application of any coating.

An alternative repair coating system to Osmoshell is to apply several coats of Epoxy Yacht HB, a high build epoxy coating. Apply 8-10 coats depending on application method, before application of AntiPest. This process is slower and will provide less thickness, but is much easier to apply (roller only), and the final result will be a good alternative to Osmoshell in terms of water resistance.

Painting process for an osmosis repair system of a fibre glass hull:

(*) If abrasive material can not be used, coarse sanding with P40 – P80 dry paper should be carried out in order to  assure the correct surface roughness and full adherence of the system.
(**) Finishing filler is recommended to obtain a smooth surface. It is not needed in terms of water resistance, but Epoxy Yacht HB is a high build coating which may leave certain roughness after application. Epoxy Yacht HB should not be sanded to avoid film thickness reduction. Finishing Filler can be easily sanded to get a smooth surface. Moisture content of the hull has to be less than 1% before application of any coating.

On top of new substrate or completely sanded.

On top of new substrate or completely sanded.

On top of existing paint system in good condition.

The necessary amount of paint depends on the area to be painted and the spreading rate of the paint. 

A simple way to calculate the area is to measure the distance from the waterline to the deck and multiply this by the total length, multiply by the two sides of the boat and add the area of the aft part. Since boats have different design, this calculation is only an estimate. Divide this area by the spreading rate of each product (information available on the can and the technical data sheet) to determine how how much paint you need. 

This table indicates roughly how much paint is required for each boat type:

On top of new or totally sanded wood:

To achieve a very high gloss when applying Ravilakk or Clipper II, it is advisable to apply one coat per day with sanding in between with a fine grade sandpaper (P320–P400).

Benar Marine can be overcoated after 24 hours. Application may be done by applying very thin coats, brusing carefully.