There is disclosed a building panel (1), such as floor panel, comprising a core (3), the panel further comprising an upper arrangement (5) being attached to an upper side (3b) of the core and/or a lower arrangement (7) being attached to a lower side (3a) of the core. At least one of the core, the upper arrangement and lower arrangement is mineral-based, and at least one of upper and/or lower arrangement comprises at least one rigid layer. The rigid layer comprises at least one of an impact modifier or an acrylic processing aid.