This stuff did not work on my wooden porch railing. I'd used the Concrobium Mold Control about a week prior to using the Mold Eraser. The Mold Control was supposed to have killed all the existing mold, and the Eraser was to remove any remaining stains. I sure hope the Mold Control did a better job of killing the organisms than this stuff did of erasing the stains.

This thing got rid of the mold that was growing in my bathroom. I hated how my bathroom smelled so I figured mold was growing. I tried bleach, I tried vinegar and it solved the appearance problem for a couple of days but the moldy smell always persisted. I used half of this packet for my bathroom, since the room is small, and it got rid of the appearance and the smell. The product itself had a strange smell but not as unbearable as bleach or vinegar. I didn't have an extreme mold problem but it was in all the walls and the ceiling and the smell was bothering me so I wouldn't know how this works for tougher problems. I also used this in conjunction with the Concrobium Mold Control aerosol since I read that they work great together.