This paper presents a Takage-Sugeno (T-S) fuzzy control strategy to regulate the molten steel level of a strip-casting process. The aim of the process is to produce a solidified strip of constant thickness given by the roll gap under a constant roll separation force. The molten steel level may be controlled using the tundish output flow or the casting speed. However, the casting speed is usually used to control the roll force separation. To improve the strip thickness uniformity we propose the introduction of an intermediary tundish submerse into the pool between the rotating rolls. The molten steel level is thus controlled by the intermediary tundish output flow. Simulation results are presented considering the real system parameters and different linearization models. For comparison, results with the Mamdani’s fuzzy model are also included.