The Strengths of M300

The Strengths of M300


The M300 Antifouling is predominantly made up of 99% pure copper. Copper is recognised as a powerful biocide agent. It is associated with a specific hybrid polyester resin that ensures that the metal is securely held on the hull and the metal particles are bonded to each other. No other biocide agent comes into play where the efficiency of the M300 is concerned. The release of the copper ions alone stops the functioning of the respiratory mechanisms of microorganisms that try to attach themselves to the treated surface. 

The boats that have been treated over several years in addition to the tests carried out, especially those by Poseidon’s laboratory in the Tuticorin Bay in India, which is known for its very aggressive waters in terms of encrustation, show a lack of growth of living organisms, be it in salty or fresh waters.



The M300 composite is extremely strong and resistant: Barcol test results, ASTM D 2583 Standard = 90; pencil test results, ASTM D 3363 Standard = 6H; Taber abrasion test results, ASTM D 4060 Standard = 0.2% loss after 1000 revolutions

The Adhesion of the M300 is extremely high due to its polyester bond and its low thickness (200 microns), which ensure a certain flexibility and thus, an excellent resistance to impacts.

The theoretical service life of the M300 is a minimum of 25 years. Nevertheless, we recommend one coat every 5 years.



The M300 Antifouling is a polyester composite that, unlike its competitors, combines the advantages of practically anyone being able to apply it, either with a roller or a spray gun, and the fact that it is single-layered.

If the application guidelines are followed, a boat treated with M300 is dry to the touch in 1 hour and perfectly hard in 12 hours, which considerably reduces the downtime period

After 5 years, a simple single-layered coat shall suffice, if applied on the previous coat after a light sanding for a perfect adhesion.



The M300 need not to be applied again until another 5 years. Only in case of a collision that damages the exterior hull or in case of any osmosis blisters, you may be required to apply a new coat, which will only be partial and a one-time thing.

Depending on the encrustation level of the water in which you are sailing or are docked, the  M300 calls for a simple but regular maintenance that consists of a manual (or automated) brushing of the exterior hull. As a result, a significant part of the M300 wears away and remains bonded to the exterior hull. A biofilm is then formed on the hull which insulates the copper and stops it from being completely active. It is thus necessary to remove this biofilm in case of an overgrowth. The boats that sail a lot, and at a sufficient speed, benefit from the friction of the water on the exterior hull, which scrapes off a major part of the protein-based biofilm that is formed by the destroyed microorganisms. Nevertheless, this is information to be kept in mind and not to be used to skip a visual inspection.

A slightly more extensive sanding of the M300 after a hardening (refer to the Technical Datasheet) greatly enhances the glide of the hull, which leads to greater speeds and reduced consumption.



This is the dimension resulting from all the qualities of the M300.

It does not scatter or disintegrate in water, it does not contain any biocide agent other than copper, it is applied at sporadic time intervals, it improves mileage, etc. Therefore, its application reduces the overall ecological impact of the boats on which it is applied.