I picked at it a bit today. Looks like silicone, but i guess the Dicor would be a good fix too, especially since I already have a tube of it. I'll try to get an answer out of Renegade in the morning.
2006 Renegade/Freightliner Coronado 43', Detroit, twin screw, 12spd
2001 Ford Excursion PSD
2017 Ford F450