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If front window or side window is leaking, simply remove using cordless drill, re-seal using Butyl putty, re-install, then add clear ProflexRV (not silicone) around its outside edge. For neat edge, apply masking tape, then apply the ProflexRV, level off with wet finger, then remove the tape. If window has foam strip on its inside lip, simply remove. If wondering, Butyl putty replaces this foam strip.
For DIY video surf:
- click here - If wondering, I re-sealed 11 of the windows within my 2006 Jayco. To my surprise, 3 of it windows were leaking (1 leaking really bad). And, I didn't even know it. Glad I did this DIY maintenance items to my 2006 Jayco (when it was 4 years old).