This is a great product!! I used it on mold that was in our shower on the grout at different places. I followed the instruction and it did exactly what it said it would do. I had to apply it twice on the real tough spots but it did remove the mold.
This stuff works, I had years of mildew that laughed at whatever I tried. I had to do three treatments and basically use most of the bottle, but it works. If it worked for me, it will work for you.