I recently re-grouted my bathroom shower and am having problems getting the grout completely sealed. It seems no matter what I try, the grout still absorbs water. Not only does it look bad when wet (color darkens) but I am sure the re-grout job will not last long with it constantly being wet. Here are some particulars that may or may not be important:
- The problem is worse on the floor, where there are 2 1/2" square tiles. The walls, with 4" spuare tiles, have the problem in some areas but parts of the walls are also perfectly fine. Parts of the floor are fine, for that matter.
- I have tried about every type of sealer I can find. The first type I used was TileLab SurfaceGuard, which I think is a penetrating type. This appears to have been the least waterproof any all the types I used.
- The old grout was white. I re-grouted with an off-white sandless.
- I only removed the old grout as deep as needed. Where the grout was in relatively good shape, I only remove a little depth with a grout saw - just enough so the new color would be uniform.
Did I do something wrong?
Thanks!