Grouting pitted travertine

[tommyzooom]

Guys thank you all so much for your advice.

if I seal the tiles before grouting wont that stop the grout from adhering?

Yes, to a small degree.... Try using a small gloss roller, which will "paint" the flat areas of the tiles, but not into the holes. Then seal the tiles AND the grout after it is dry

 

[Handyman Ed'son]

What about using caulk instead of a bag? You'll be able to seal afterwards.