The seams do work a little as the aluminum expands and contracts so, yes, eventually you may need to reseal the seams. It is annoying but simple: tape off both sides of the seam with blue painter's tape, apply the sealant, smooth, remove tape.
Mike
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Sorta new (usually dirty) Nissan Titan XD (hardly paid for)
Middle-aged Safari SE
Young, lovely bride
Dismissive cat
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