APPLY TO YOUR ANTI-FOULING PAINT. When barnacles and zebra mussels are just hatched the swim looking for a hard surface to attach to, anti-fouling paint is a hard surface and they attach by using the strong cement it produces and continues to produce. That is why they stick and keep growing. chemicals in bottom paints won't stop them. It is microcrystalline clear wax, contains no carnauba and no ceramic. 32oz. covers 64 sq. ft. below the waterline. Invented by an old boater. Contact me with questions.