As part of NGC's work on the Washington State Antifouling Boat Paint Alternatives Assessment, NGC surveyed the current marketplace for different technologies to address fouling on recreational boats. Broadly, these technologies can be split into two different mechanisms: Biocidal and Non-biocidal.
Biocidal technologies are antifouling paints that function by using a chemical that is toxic to fouling marine life. Today's marketplace for biocides includes Zinc Pyrithione, Econea, and Seanine. Medetomidine and capsicum are two emerging biocides, and formulators are currently seeking regulatory approval for them. Aequor has an additional ~40 compounds that may be appropriate for antifouling boat paint, some biocidal, and some dispersants.
Non-biocidal technologies include foul release paints and ultrasonics, a non-paint technology. Foul-release works by providing a smooth surface that marine life poorly adheres to. While some fouling may occur when the boat is stationary, it is easily removed by cleaning or even by the gentle motion of the boat through water.
Additional emerging technologies include novel polymer coatings, hull-covering tarps, and automated boat washes that pair well with hard and smooth foul-release coatings.