I've got hairline cracks opening up between tiles in my shower, and it's leaking enough to show on the paintwork below. This is due to the tiler tiling direct onto marine ply, lesson learned but I'm not in a position to rip it all out and start again.
Can I use silicone to seal more effectively? The grout is Mapei silver grey and I can get identical coloured silicon. My instinct is to rake it out where there are cracks, put silicone in the channel, then grout again on top to make it all look consistent. Will this work, or will the grout fail to bond because of the silicone? In which case, can this be done well with silicone alone?
Can I use silicone to seal more effectively? The grout is Mapei silver grey and I can get identical coloured silicon. My instinct is to rake it out where there are cracks, put silicone in the channel, then grout again on top to make it all look consistent. Will this work, or will the grout fail to bond because of the silicone? In which case, can this be done well with silicone alone?