Can I get a bathroom mirror cut at the glazers that won't get damaged around the edges over time?

[Goonerz]

We had one cut before and after a few years the silver started to fade around the edges.
Can we get one cut that this won't happen to or is there some treatment you can put on the edges?
We can't buy a readymade mirror as it needs to fit a specific space.
Thanks

Don't know - but we had the same problem, it's very annoying.

I work with glass - have done for decades - and years ago there was never a problem with cutting mirror glass as good quality materials were used. Nowadays, as with many other goods, I've noticed that when I cut the mirror glass, or even when it's just been stored for a matter of months, the silvering flakes off the back.
I can't suggest any official treatment for the edges as I don't know of any. If you decided to try using substances such as glues/varnishes/tapes etc, I honestly couldn't say what the long term effect would be, and if it were me I would need to try out small, long term experiments first.

If the modern mirror glass isn't as good as older glass, maybe you could buy a big vintage mirror and have it cut down?

I've got three and none of them have had this damage over the... 4 or 5 years I think it's been. Mine's screwed on to the wall, is that the difference?

I’ve got 2 mirrors cut to size been up for 8 years with no problems whatsoever. One is 160cm wide and maybe 110cm high.
Both bathrooms are well ventilated with fans so don’t steam up. I used a local glazing company.