Selecting the right hard antifouling for your boat
What is Hard Antifouling?
The basic and original type of antifouling, when immersed and in a wet state this antifouling is hard enough to withstand regular wiping down with a cloth or sponge without removal of substantial quantities of paint. Hard antifouling does not wear away much at all, although abrasive material in the water such as silt and sand may lead to a very minor reduction in film build. Eventually however, you are left after a few seasons with a build up of product that requires removal. The product becomes unsound and does not retain sufficient internal strength to be able to hold together when new product is applied to it. If you have a seriously fast boat or a fast boat that is used very regularly then hard is probably the best way to go. Boats moored in fresh water normally use these types, as the eroding types may not erode very well.
Keen racing types sometimes prefer hard products as they can be wet sanded to a smooth finish prior to racing.