WATERPROOFING
If your grout and silicone are in good condition we can apply a clear solvent based liquid which will waterproof the grout and porous tiles.
The waterproofing compound penetrates deep into the grout, porous tiles and also hairline cracks, forming a permanent water-repellent barrier.
This is not a coating, as coatings fail if chipped or scratched and wear off due to ordinary cleaning.