Tiling my kitchen floor - slate tiles

[Flintstone]

My recent slate job I used stainstop mn which was good, slate isn't very porous, I think I used around 1.5lt for 40sq m

 

[Futuregrout]

Thanks both. You are right about the scratches - I couldn't believe just how easy it was to scratch them. We have metal based stools for the island but I'm going to cover the bases with felt before putting them back. I actually wanted the honed slate but the supplier almost refused to sell it to me when I told them it was for a kitchen floor because they scratch so easily.

As regards sealer:I have lots of ltp matt stone left over from the bathroom so was going to use that but open to suggestions for better options