Shower tile in bad condtion - Sealer?
Tile & grout is not what makes a shower waterproof. If done right a shower is waterproof before any tile is installed. That is what the shower pan, (membrane) is for and waterproofing membranes for the walls too. There are several methods. Grout sealer also does not waterproof anything.
Tile 4 You LLC Troy, MI
KERDI Shower Specialist ... DITRA Installs ... Product-Method suitability consultation. I have NEVER made a mistake, I thought I did once...........but I was wrong! - PRODUCTS ADVERTISED WITHIN MY POST ARE NOT ENDORSED BY ME!