Geocell Proflex sealant is recommended for sealing around the tops of window frames, marker lights, etc. It looks like silicone when it hardens, but it's not. I've used it to touch up my TT, and it was especially useful when I replaced the seals of all my windows with butyl tape. After the butyl was done squeezing out, I ran a bead across the top of each window.
I think Jayco uses QUAD sealant at the factory. I picked up a tube of that for some touch ups as you mentioned and it looks the same as what's on there already.