G'day Anji.
I did a google on M Seal. I can't speak Indian but I got a laugh out of their 1 minute Utube ad.
In a perfect world I'd use a big end shell without the hole. I do remember buying a set with only the hole in 1 shell. Can't remember where from
. Any of those 2 pack epoxy adhesives like that would work. What I would do is countersink the hole (big end shell side) about 1/16" deep. Warm the rod and try to push it down the little hole as far as I could before finishing it off just below flush.
Cheers