I had a serious mold problem on a closet wall underground in a corner of my basement. I needed something to kill the mold so I could clean it off the wall and baseboards. It did exactly what it said it would do. It killed the mold so I coud safely remove it. It takes some elbow grease. The mold has not come back as the product indicated and it has been nearly 6 months. There are other products that are cheaper and you can make your own for practically nothing, but the key to mold removal is to know what you are dealing with and wear the proper protective clothing and a respirator. Some molds are deadly but all can cause health problems if your allergic.