We have noticed several small dark mold stains are recently in the bedroom. Because of the good reviews much choice on this product. After we ordered it and a waiting period of 2 days, it was also applied immediately. Conclusion: - On woodchip, within a few minutes away the stains you can almost sit and watch, no discoloration noticeable - Silikonfugen see after use like new The exposure time is described with 30 minutes took us in practice, perhaps a maximum of 5 Minunten until the first successes were visible. The swimming pool smell (through the contained chlorine) disappears by anschliessenen airing also quite fast. For the fast and reliable mold control this mold spray is highly recommended.