Outdrives are difficult to keep free of growth. The main reason for this is that traditional copper-based bottom paints cannot be used on an aluminum outdrive. Doing so will result in serious corrosion from the aluminum reacting to the copper in the paint.
The Safe Solution: Use Copper-Free Paint
To protect your aluminum outdrive and keep it clean, you’ll need a copper-free antifouling paint specifically formulated for use on aluminum. Several brands offer effective options—Interlux, Blue Water Marine, and Sea Hawk among them—but for best results, we recommend pairing with Tuff Stuff Primer and Colorkote.
Why This Combo Works
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Tuff Stuff Primer creates a protective barrier that shields the aluminum from moisture and corrosion while ensuring excellent paint adhesion.
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Colorkote Outdrive Paint delivers strong antifouling performance without copper, making it safe for use on aluminum components below the waterline.
Application Tips
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Surface Prep: Start by cleaning the outdrive thoroughly and removing any old paint or marine growth. Sand the surface lightly to create a rough texture for the primer to bond.
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Prime: Apply Tuff Stuff Primer using a roller or brush. Follow the manufacturer’s recommended drying times.
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Paint: Once the primer is cured, apply Colorkote with a brush or roller. Two coats are typically recommended for optimal protection.
The Outdrive Paint shows best results when paired with a primer such as Tuff Stuff. These products are usually applied by brush and roller.
An alternative to painting is a foul release system, such as PropGlide. For more information on Propglide, see this How To Article.