How to fix hairline crack in ceramic sink?

[alostpainting]

Does anyone know how to do this? Google keeps on telling me how to fix chips in ceramic OR hairline cracks in boats (?!) Does anyone have any experience of fixing hairline cracks in a butler sink? I don’t care about how it looks, as long as it works and hopefully doesn’t crack any more

Does the crack go down to the plug hole?

Yes, it’s 3 tiny hairline cracks emanating from the plug hole

May not be able to then...

Reason I say that is we had a crack in our shower tray. Contacted a specialist company who asked us this, then explained if crack came from plug, it couldn’t be fixed properly.

Might be worth googling specialist repairers and asking them?

oh no! thank you -will do