Trust Durgol, the Swiss specialist. Over 60 years ago in Switzerland, Mrs. Maria During-Keller developed a superior method to removed lime scale deposits. She named her product Durgol. The during factory in Switzerland has been manufacturing decalcifies under the Durgol brand since 1951, and is the market leader in Switzerland and many other countries. Durgol is the name you can trust. The Durgol formula has become the world market leader in decalcification. Durgol Swiss Vapura provides care for steam stations, ironing systems and steam cleaners. Durgol Swiss Vapura is the only product of its kind on the market and provides the only device that can be used at home that specializes in decalcifying steam appliances for any brand.