Caustic calcined magnesia product with controlled reactivity produced from natural magnesite sources and calcined in shaft kilns. Its unique properties such as whiteness, microcrystallinity, high MgO availability and controlled reactivity (capability to produce mortars with adjustable setting properties) makes it suitable for magnesium oxychloride (i.e. industrial floors, grinding wheels and polishing stones) and magnesium oxysulphate cement (i.e. panels) applications. Available in two standard versions of different reactivity, in granular or ground form. LOI, reactivity and particle size can be adjusted according to customers’ requirements.