Sea Hawk Zinc-Free Barnacle Blocker, 12 oz.
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Zinc-free aerosol spray
For use on steel, iron, copper, and more
Self-cleaning, anti-corrosive primer
Excellent protective barrier on underwater metals
Barnacle Blocker is a zinc-free aerosol spray formulated for use on underwater metals including steel, cast iron, copper, bronze, galvanized steel, lead, and aluminum. Barnacle Blocker is a self-cleaning anti-corrosive primer that provides an excellent barrier on underwater metal surfaces and reduces galvanic corrosion.