A new and distinct xSedeveria plant named ‘;TSAECH1802’; which is characterized by a relatively small and compact rosette of foliage born on a strong, short stem, and glaucous greyed-green foliage which exhibits a slight bluish hue that is lighter at the center of the rosette and progressively darker towards the outer whorls of foliage, as well as the stability of these characteristics from generation to generation.