How to fix crack in mirrored tiles in shower - Tile Advice

[HowdyB]

I have a strip of mirrored tiles in my shower and two have hairline cracks which seem to be getting bigger. I have looked at resin however all the ones I have come across advise to leave in sunlight to cure as they are generally for windscreens. Has anybody used a resin on mirrored tiles and had success? or any alternatives for fixing the cracks? Thanks