I also did the thru hull and don't have any leaks either. I used just enough 5200 to bond it to the kayak and make it waterproof. If done correctly, it's not going to just come apart and sink your kayak.
I trimmed off the excess 5200 once it was fully cured. (after this photo was taken)
I am not trying to encourage anyone to do this. I just wanted to verify, from my own experience, that this can be done without compromising safety.
Jason