The primary use of the G410 Mount Gasket is for galvanic insulators to separate the Stainless-Steel mounts and mount parts and boating accessories from aluminum gunwales. You will need 2 gaskets per mount. Without the gasket on aluminum boats, corrosion may occur due to the dissimilar metals. Sold in pairs for installation on both top and
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Easy to use. Used some silcon sealant to ensure a good seal against water.