With what and how to seal marble tiles?

Question

I suspect water is seeping out through the pores of marble tiles in our bathroom shower area which causes the wall behind it to show signs of humidiy. What do I use to seal marble tiles and how do I do it ?

Answer 1

It is not the marble that is at fault
It is the under layer of water proofing
You have to remove all marble tiles
Re do a proper water proofing before re installing the marble tiles

Answer 2

Once the thinset has fully cured per manufacturer specifications, apply a high-quality sealer to the tile surface. This will help prevent staining during the grout application. - See more at: http://www.miconstruguia.com/en/installing-marble-tile/

Answer 3

If you seal the marble it will resist stains.