I would stay stock. There are many, many UCE's not leaking.
The bmw's give you a telltale sign as do the RE's it appears.
If you're the type that doesn't know every nut and bolt, and every rattle and wiggle of your bike, you would own a Honda. RE owners are very connected to thier bikes so when you polish the aluminum or snug down a loose nut, peek at the sight glass and call it good.
Using a glue or sealer is risky. Yellow weatherstrip glue goes pliable when hot, silicon gets slippery when bathed in hot oil. The beemers require the new glass to be installed dry, or with whatever residual oil is on the hands. They don't want hot oil causing a second pituui either.
For folks really concerned, toss a sight glass in the tool kit or tape one to the inside wall of the electrics box and call it good.