The Citroen TT fuel tank deruster is an essential maintenance product designed to remove rust and corrosion from your vehicle's fuel tank. This product extends the tank’s lifespan, prevents fuel contamination, and ensures better engine performance. It is easy to use; simply pour the deruster into the empty tank, allow it to work for a specific time, then rinse thoroughly. Suitable for both old and new Citroen models, it is a must-have for classic car enthusiasts and anyone looking to maintain optimal vehicle performance.