Bottom paint 101
Good comments so far, especially regarding bottom paint performance in the Florida Keys vs. New England. Here are a few facts condensed from earlier posts on the subject. More details are in the archives.The purpose of bottom paint is to deter hard growth on the hull due to marine animals, i.e., barnacles and such. That's it. The most common active ingredient used for that purpose is cuprous oxide but there are a few brands that use powdered copper metal (VC17 and Copperpoxy, to name a couple). Most paints list the cuprous oxide content on the label, however higher cuprous oxide content does not necessarily mean better performance.Regular bottom paint does NOT prevent marine plant growth like weeds, grass and slime. For that you need a bottom paint with added algaecide and slime blocker. Over the last three or four years, most manufacturere have added these ingredients to their paint formulas but there are still cans of the old stuff floating about. Check the label before you buy.Regular bottom paint does NOT prevent blisters. For that you need an epoxy barrier coat. If your boat is fairly new, you may not even need a barrier coat because of recent improvements in hull layup quality. If you trailer or dry-sail your boat and you don't leave it in the water for more than a week or two at a time you do NOT need bottom paint, nor do you need a barrier coat.If you really do need bottom paint, ask around the local boatyards and see what they use. They know what works best in your area. Try and learn as much as you can before you spend your hard earned buck$. Good luck.PeterH23 "Raven"