We picked up a 3M PN 08612 Windo-Weld auto-glass-install kit at a local glass shop. The kit comes with ribbon sealant, which spaces the glass to the right level for the reveal moldings to sit flush. Just roll it out onto the ledge of the glass channel. With the primer painted on, the ribbon will bond instantly in place, so position it with care. We started at the top center and worked our way around the opening.