Spoke to technical support at Renegade today. They said that they use white silicone, but that either material would work.
He also recommended that I remove the center cover and remove and reseal each screw! I think I'll tackle that one later and just seal the top of the trim for now.
2006 Renegade/Freightliner Coronado 43', Detroit, twin screw, 12spd
2001 Ford Excursion PSD
2017 Ford F450