Swiss original against limescale.
More than 70 years ago, Maria Düring-Keller, the grandmother of the three current owners of Düring AG, came up with a great business idea while cleaning. To rid the toilet, bathtub and taps of stubborn limescale, she took matters into her own hands and developed a highly effective descaling agent - the DURGOL brand was born. The businesswoman left and went on a promotional trip by car. She did not shy away from cleaning the toilets of potential customers by herself in an elegant dress and hat with a veil.
In 1963, her son Walter Düring-Orlob joined the company, bringing new ideas. Not only did he build the company's first professional filling machine, but he also developed a new type of descaling agent that offers unique corrosion protection. The product has been used to remove scale from metal objects since 1968. The new product - today known as durgol express - quickly became the leader on the Swiss market.