I have a basement that I am planning on finishing. There was a mold problem. After washing the basement walls, I soaked them in Concrobium. I then painted the walls with a masonry waterproofing paint that's antimicrobial. Two days later, I see brown mold stains coming through the paint. Is the mold still living? What can I do here?
I have never used Concrobium. I have cleaned foundation walls with hot water and bleach. Now that you have painted you have added something else into the mix. The paint can actually harbor the mold. I would simply get a heavy bleach and hot water solution with some heavy duty metal brushes and scrub the crap out of the whole area. The paint probably has to go. Make sure you have gloves on, goggles, and a mask.
Fan the area out for 2-3 days. You need to wait a minimum of 2-3 weeks and possibly a few months before I would even think about drywalling.
I would really try to get at the source though. Even if mold is growing it needs food. It wouldn't have returned that back unless your basement was feeding it water. If you don't take care of the moisture issue first you will keep fixing a mold problem.