I recently found mine separating on both sides around the lower corners. I used a self mixing 2 part epoxy (5 minute I think) to reseal mine. Held it together for 10 minutes, wedged a towel against the inside glass overnight and it came out great. No indication it's separating at all and it's in the northeast with a lot of sub zero temperatures lately. I haven't put the top up or down though. The next day I bought another 2 part epoxy made by the same company from a different store, but it was their 1 minute version and it didn't work very well at all. Seemed like it didn't really harden correctly. If you decide you want to try the 2 part epoxy, I can get back to you on which one worked so well for me. I did have only about 8-10" separating though, so if most of your window is separated, I'm not sure how this would work for you.