Keramag gives you a 30-year guarantee on the KeraTect® glaze and on the consistent smoothness of the ceramic surface. With normal use and regular cleaning, the smooth surface offers optimum cleanliness and hygiene properties. This means that the quality products from Keramag stay shiny and brilliant in the long term. No impregnation or specialist cleaners required. The guarantee relates exclusively to production faults. Other faults, especially those caused by improper handling or use or by external factors shall not be covered by the guarantee.