On 14 Apr 2021, NY wrote

"The Natural Philosopher" wrote in message
...
I've always wondered how effective it is to glue a glass slide
over a crack. It depends rather critically on the bond between
the glue and the glass being stronger than the glass itself -
otherwise as the wall moves, it breaks the glue/glass bond (or
the glue/wall bond) and the slide remains intact.

Even that is as helpful

Assuming you can *see* that the glue joint has failed. Not as easy
to spot at a glance as a crack across the glass.

I know this is a diy group, but isn't thisi a case where using proper
crack-monitoring tell-tales would be better than making you own?

Cheers,
Harvey