TrailManor Service representative (Ed Lytle) sent me a tube of their sealant. See my post under Factory Sealant for more info on sealant.
I was going to remove the antenna, clean it, and re-caulk. Decided I could make things worse, so removed and re-caulked the screws in the base, the hole where the antenna wire goes, the top and bottom of the boot, and touched up the caulk around the outside of the base.
I flooded the roof and antenna assembly, after a couple days, and there is no longer any leak.
Virginia Deacon
2006 TrailManor 2720SL
2000 Ford Explorer 4x4 w/SOHC V6 and Equal-I-zer hitch