Has mold damaged your concrete? They look like either black spots or green areas caused by moisture. The mold cleaner for concrete can help you fix that problem. Mold stains on wood, bricks, concrete, and more are easily removed with them. Just give the affected areas a thorough cleaning and scrub. Scrubbing hard will help you reach deep into the concrete's pores. Let the cleaner soak in. Power wash the concrete after you've cleaned it to remove any remaining mold.