The "Yep" was in reference to the Zap-a-gap being the same stuff I use. I wasn't however, making that as a choice for you. Just affirming that you had correctly identified the stuff that I use to seal split Jensen cylinders.
On another note, I have no experience with Gorilla Glue, so you'll have to make that decision.
Once again, without really knowing the situation, up close and personal, I cannot really evaluate best application.