For aluminum surfaces above or below the waterline use our Zinc Chromate. This powerful primer etches into aluminum, forming a strong surface/primer union that is resistant to corrosion. For steel and iron surfaces, especially welded joints, above or below the water line, use our Zinc Cold Galvanizing or Zinc Phosphate. This corrosive barrier contains a high percentage (95%) of zinc for maximum resistance against solvents and abrasions. 12 oz.
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