As is typical, my rear window is starting to separate along the passenger side bottom. Can a "spot repair" provide enough weatherproofing, or should I (sigh) remove the entire window and glue/seal the whole thing?

I got all the 3M window weld, primer and glass clamps. Thanks.

 

I resealed mine when it was about half loose about 6 years ago and it is still holding however I keep mine garaged.

 

I resealed mine when both bottom corners started to separate, it lasted about six months then it started separating on the sides and on the bottom from where the repairs were made. Again, fixed this and it lasted about three months in the dead of summer started seperating where it was not repaired. Maybe i should have separated the window and repaired it all the first time but did not, I replaced the top last September and couldn't be happier with it. Good luck with your repair, there is a sticky on how to do this.