I know this is an old post, but I'm hoping someone here can help me out - I have an exposed brick wall in my shower and am looking to re-seal it.
I purchased my first house about 3 years ago, and did some renovations in the first year. I did as much as I could myself, but I'm not the handiest guy out there, so I hired contractors for all the big stuff. When we removed the old shower tile, we got down to a brick wall. I asked the general contractor if it would be possible to have an exposed brick wall in the shower - he said yes, as long as a good sealant was used. Unfortunately, I'm not sure what kind of sealant he used, and am no longer able to get a hold of him. It's been 2+ years since the brick was originally sealed, and it seems to be holding up well (with daily showers), but there is a part of the wall that gets the most splash when the shower is used, where the sealant (which has a bit of gloss to it) seems to be wearing off and I've noticed a couple tiny spots of mildew have formed. However, the brick doesn't seem to have stained/discolored, deteriorated or softened at all.
I was planning to scrub the mildew spots, then let the brick dry for 24-48 hours and apply sealant, but I had a couple questions:
1) Have I done any damage at this point? Is there anything I need to worry about or repair?
2) Do I need to do any prep before applying sealant?
3) What kind of sealant should I use? I found one forum online that specifically recommended an acrylic sealant like TileLab Gloss Sealer and Finish:
Or Glaze N Seal Grout Sealer:
Or I also found Saver Systems MasonrySaver Acrylic:
However, I also had a friend recommend using a marine masonry sealant. Searching online I found these two products that seemed like they might fit the bill:
4) Any other recommendations/advice?
Thanks in advance for your help!