My daughters end cap came out of her Demarini Prism this weekend. The bat is not under warranty and has not been altered. Does anyone recommend any type of epoxy or adhesive to use to put this back in with? Thanks.
Technically, that bat is done and cannot be used due to the damage. It is currently an "illegal bat". If you glue it back in, it becomes an "altered bat" and carries those penalties.
That said, it also falls under the "who's gonna know" category if you reattach it correctly and cleanly.
Marine epoxy was recommended to me by a certain member of this community who knows a few things about bats. If asked, I would completely deny successfully reinstalling an end cap using that product.
I work on golf clubs. The epoxy I use to glue a shaft to a head should be plenty strong enough. Just use a 2500 lbs two part epoxy.
Don’t use too much, you don’t want any excess breaking off and causing a rattle.
Bat manufacturers are notoriously sloppy, often leaving excess material on the inner surface of the barrel. A smart consumer would remove a layer or two of said material before replacing the end cap.