Ziggur wrote:
In article ,
says...

Superglue is the only option.

Rubbish.

Glazing tape works well. It can be retro-fitted but the point that
Andrew makes about thickness is valid. Using tape will decrease the
space available for the sealed unit and so it might be necessary to
use new glazing beads as well. A friendly local window fabricator
will supply and advise.

Well, for a start the OP never advised whether he's talking about
timber DG windows, which typically have wooden beading nailed around the
outside - very easily removed by a tealeaf, and well-suited to the
glazing tape solution - or uPVC stuff. If the latter, then the uPVC
beading profile is highly dependent on the brand of the window, and if
the local chappie doesn'ty do that brand the OP will be stuffed. I once
had to try to source replacement uPVC beading for some relatively new
Rehau windows but drew a total blank after the profile design had been
changed.

David