Subscribe or Renew Membership Subscribe Renew

How to clean hardened grout off of slate

ChrisProctor's picture

Hey everybody,

i got myself into a tight spot while grouting my slate floor. I didn't get to the sponging in time and the grout has set up pretty bad on the face of the tile. The grout is harder than the surface of the tile, so scraping and wire brushing is not an option. Any ideas for cleaning chemicals or any way of getting the grout loose from the face of the tile?

HCl (post #215020, reply #1 of 3)


But don't use it on marble. (post #215020, reply #2 of 3)

But don't use it on marble.

Of all the preposterous assumptions of humanity over humanity, nothing exceeds most of the criticisms made on the habits of the poor by the well-housed, well-warmed, and well-fed.  --Herman Melville

I heard that some slate are (post #215020, reply #3 of 3)

I heard that some slate are acid sensitive so do test first.