I linked above an Apple link, and you can find examples where iPhones will get refused warranty because of water damage. This proves that GLUE is less then 1oo% effective.
q.e.d
Prop2 Monkey shit might be better then glue.
Since glue <100% and I used the word "might" then there is a chance that monkey shiot after a monkey eats a special food is better.
q.e.d.
My point is that is a terrible excuse if you demand me to prove that glue is exactly 0% effective, I don't have the lab to prove it but A[ple that has the lab decided not to offer you water proof warranty, so either you are happy with
1 glue , is not effective enough for Apple to offer a warranty
2 glue is effective enough but Apple has some sinister business reason to reject your warranty if their water sticker turns on.