Costelan C FAA 1920 is a water-based sealant for porous surfaces such as stones, unglazed tiles, joints, terracotta, concrete, granite and bricks. It impresses with its high oil and dirt repellency and resistance to stains. Costelan C FAA 1920 is anionic-aqueous, non film-forming and fluorine-containing and is VOC-free.