This article discusses the options for neutralising the waste fluoroanhydrite also containing residues of sulphuric acid. A process is proposed by which all reagents provide a neutral or alkaline environment with pH = 7 which remains unchanged for more than 28 d. This indicates that complete and irreversible neutralisation of the toxic fluorine-containing waste materials was ensured. The used reagents were CaO, CaCO3, KOH, Na2CO3 and Ca(OH)2. The most efficient reagents, also resulting in stability of the product are CaO and Ca(OH)2. The obtained results lead to proposing the use of the process output as a component for the production of ceramic products for the construction industry. This will allow obtaining additional benefits from replacing primary natural materials and the associated emissions for their sourcing and production.