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Understanding Bottom Paint

| Maintenance | April 5, 2011

This is the time of year where you are planning your next boating season and before you launch your boat, you more than likely will be repainting her bottom. So what to use? Today paint choices are abound, but the main choice is between;

Hard antifouling

Biocides/toxins

; When a bottom gets fouled the first sign is a slime covering the bottom called biofilm, which then leads to algae growth which in turn leads to barnacles and other creatures attaching to the bottom. To combat this Bottom paints contain biocides, cuprous oxide being the most popular, which are released at a controlled rate.

Level of Toxins

Hard paints contain varying levels of biocides which are released slowly on contact with water. Ablative paints generally contain lower levels of toxins but they are released at a more steady rate as fresh paint is exposed. In addition to Cuprous Oxide many paints now include a slimicide to prevent growth of slime. Slimicides can be identified by the names; Irgarol, Biolux by Interlux, and SR Slime Resistance by Pettit.

Cost of bottom paints ;

Full Article Bottom Paint Guide

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