Solder Fast & glass bracelet

Hi all: I’m cutting and firing wine bottle necks into rings that I’m
making into bracelets. Using sterling 18g wire rings to connect the
5 bottle rings and would like to solder the rings shut. I bought
Solder Fast from Rio and covered the glass rings w/ wet newspaper.
Was so happy when they were soldered shut, only to find an hour later
that I could easily pull them apart.

Any advice?
Thank you!
Trish