Abstract: A tool for use in consolidation of a fibre-reinforced component has an outer casing supported by an internal structure. The outer casing has a first contact surface, which is provided for the purpose of resting flat against the component during the consolidation of the component and predetermining a shape of the component in some section or sections. The internal structure and the outer casing are configured in such a way that, when the tool is heated from an initial temperature to a consolidation temperature required for the consolidation of the component, the tool expands in such a way perpendicularly to the first contact surface that a defined first pressure is exerted on the component by the first contact surface. The use of a component of this kind is furthermore claimed and described.