A convertible top comprising a plurality articulated rail links that move the convertible top in a fore-and-aft direction. A trim piece carries a window seal and is assembled to at least one of the rail links for movement in the fore-and-aft direction. The trim piece also moves in a lateral direction outwardly when the top is retracted and in the lateral direction inwardly when the top is extended. A stop member is secured to the trim piece and at least one rail link to limit the lateral movement of the trim piece relative to the at least one rail link. A cam block is secured to the trim piece and at least one of the rail links to guide the lateral movement of the trim piece relative to the at least one rail link.