Dyeing grout

[bsr]

Hello

The previous occupants of my house loved black floor tiles with wide white grout lines. Funnily enough they have greyed and look crap.

Has anyone had any luck with dyes or other surface treatments that I could use to colour the grout grey, so that it doesn't look so dirty?

Thanks


bsr

 

[Mottie]

Indelible marker pen? Ink?

 

[foxhole]

Touch up pen for uvpc, paint in a pen.