What do YOU use?

Question for all you pro's or not pro's. What should i use for re-sealing all outside window seals,Lights,Around outside refer vent etc..?

I gather from reading other post "coolseal" works best for the roof vents, around a/c, etc.. Should i use just plain ole regular rtv for the NON-roof items

What has worked best for all of you out there????
What do YOU use?

Our local RV dealer says to use GE Silicone Caulk with a II in the label for doors, windows etc and self-leveling rubber roof sealer on the vents, sewer pipes, a/c on top of the TT