cover wrote:
I installed 12" wall and floor tiles in a bathroom with 2"x2" tiles on
what used to be a painted, concrete shower floor with a 6" stub wall
about six months ago. It's all holding up nicely but I did find
recently, some missing grout where the 2" tile meets the schluder
which supports the bottom of the 12" tile as it goes up the wall. Gaps
were approximately 1/4" or less and I used a fine brush wire wheel in
a drill to clean off any soap scum or old grout sealant prior to
re-grouting. The grout repair *seems* to have gone well and now my 3
days (or so) are running where I mist the grout a couple of times a
day to get some cure time prior to using the shower again. Here's the
big question... Instead of using a conventional grout sealer, should I
use clear silicone or tub caulk?

I would probably use a caulk at that joint between the Schluter and the
2" tile, but you need to have some space there for it. In other words
you may need to remove some of the grout to allow for the caulk. As for
the rest of the grout joints a good grout sealer will help.

Oh, and you've probably misted enough. It needs to be dry for either
caulk or sealer.


2nd question as a quickie... what is the preferred method of cleaning
grout lines prior to re-sealing? The wire brush *seemed* pretty
effective but not being an expert, there might be something that works
better. TIA for any help. :-)

I used an acid based cleaner from a tile store to clean grout before.
It seems to me that a wire brush would scratch the grout and look unsightly.