I used it in the toilet. I bought this item despite the bad reviews for this and similar products, thinking no one uses them properly. Well, between removing the old putty. Steam clean everything to make sure there is no urine and used the dryer for literally a full day before applying. I still failed. After applying the next day and using a hair dryer etc it looked beautiful and after 2 days it was all gone. Disappointing. I will try a second app with the rest but not sure what I could have done differently.