You want to fix that missing butyl tape in the first pic. Either make the dealer do it under warranty, or if you're reasonably handy and the dealer is far away or wants to take a month to fix it, just pull the window yourself and do it. Butyl tape is cheap and every RV place has it, as does Amazon.
As mentioned above, do not even think of using silicone sealant on your RV. It will not hold up, nothing else will stick to it, and it is very difficult to remove. Use Dicor self leveling lap sealant for horizontal surfaces, non-sag for vertical. Again, every RV place will have it.
