New answers tagged grout
The short answer is no, not without removing the grout that has already been applied, and that is a truly miserable exercise. The link in the comment from Niall is your best bet. Sealer/stain.
This is really impossible to answer without opening it up more. But basically it depends on the damage already done. What you really need to do is clean this shower (bleach) and take out any loose pieces. And let it sit for a week. Also try to keep the humidity in the room low too. If nothing grows back and your tiles are structurally bonding you can ...
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