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Message: <blockquote data-quote="LDUBS" data-source="post: 504497" data-attributes="member: 21536"><p>According to a little research, not all silicon sealer is the same.  The problem is not the silicon but the acetic acid contained in silicon products.  A silicon sealer that does not contain acetic acid or other corrosives would be fine to use.  It should be easy enough to check if something is compatible with aluminum.  And of course trapping salt water is always going to be something to avoid.   There are better products and best practices apply.   I won't be using any bathtub sealer/caulk on my boat.  My two cents.</p></blockquote><p></p>