Bottom Paint Explained
To keep your boat’s bottom clean and fast, some type of Antifouling bottom paint must be applied. This specialized paint contains copper compounds or other biocides to deter the growth of marine organisms.Browse Bottom Paint
About Bottom Paint
Defender carries all the major brands of bottom paint. We stock copper-based bottom paints, copper-free paints with biocides, and water-based anti-fouling bottom paints, as well as bottom paints with anti-slime additives.
Ablative Bottom Paint
• Wears away with use, exposing new biocides.
• Good for impeding marine growth, but requires the boat to move often to work most effectively.
• Use in high fouling areas, or if the boat is hauled out every season.
• Use of a “signal coat” is recommended. A signal coat is a bottom paint of a different color than your final coat. When the signal coat shows through, it’s time to consider repainting.
Hard Bottom Paint
• Active ingredient leaches out while paint film stays mostly intact.
• Long-lasting adheres well, abrasion resistant, works equally well at the dock and underway.
• Recommended for boats that regularly run at high speeds or are in the water for extended periods.
• Best for trailered boats.
• Has fewer VOCs, less odor, and cleans up with soap and water.
• Safe for use on inflatable boat tubes & fiberglass hulls.
Hybrid Bottom Paint
Offers all the advantages of ablative and hard paints.
• Exhibits excellent performance and abrasion resistance.
• Recommended for racing boats; some can be burnished to a slick finish.
Copper-Free Bottom Paint
• Uses alternative biocides like zinc or Econea®.
• Can use over almost any bottom paint; suitable for any substrate, including steel, and aluminum.
• Lack of copper allows for a selection of bright colors.