If its new take it to the dealer. If it's not new, IOW it's your problem and not Jayco's problem, I would put eternabond tape over it and forget it. A potential hole in the roof is only a problem if you don't find it and deal with it before it becomes a leak. Also, even if it's new I would allow the dealer to tape it, but I would at the same time have all the seams covered.
No man has a good enough memory to be a successful liar. Abraham Lincoln
2016 36FBTS Pinnacle
2016 F350, 6.7, 4x4, DRW, long bed
B & W Companion 5th wheel Hitch