Vitrex Grout Clean & Polishing Kit 6 x 6" (69180)

Thank you for your enquiry and interest in Vitrex products. Our appologies for the late reply, yes the pads work for already set grout - use the coarser one first. We would suggest that you wet the sponge, the less chemicals you use the better for removal. You may want to use chemicals on the tiles after you have removed the grout. The pads are designed so they wont scratch your tiles. I hope this has helped to answer your question.

We would advise to use them wet as not to damage the tile.

Yes but you will also need the Heavy Duty Tile cleaner to remove the dried grout the cleaner will soften the grout .