Viakal Classic Limescale Remover Liquid, 500 ml. Removes up to 100 percent of limescale (tested on most common bathroom surfaces) and cleans soap scum. Viakal descaler spray is a professional, powerful descaler, designed for periodic descaling of washroom surfaces. It effectively removes lime scale and hard water marks from fixtures, sinks, wash basins, toilet bowls/urinals, tabs, showers and bathroom tiles, leaving them brilliantly shiny.