Best Ready to Use Waterproof Grout for Bathroom floors -Beige

[LizzieMac]

Can anyone recommend a ready-to-use waterproof grout for an elderly diy-er to attempt to repair grout in beige bathroom tiles please?
Thank you in anticipation of any replies.

 

[Chofidelilon]

Mapei epoxy grout! Or Any epoxy premix grout.