ISTRA 50 is a normal setting, rapid hardening Calcium Aluminate Cement with high early strength. It differs substantially from the usual calcium silicate cement (Portland cements) in its manufacturing process, chemical composition and rapid strength gain. ISTRA 50 is composed of calcium aluminates with high early strength, refractories, high abrasion resistance and resistance to biogenic sulphuric acid corrosion (BSAC).

ISTRA 40 is a normal setting, rapid hardening Cal-cium Aluminate Cement (CAC) with high early strength. It differs substantially from the usual calci-um silicate cements (Portland cements) in its manufacturing process, chemical composition and rapid strength gain. ISTRA 40 is composed of calcium aluminates with the following characteristics: • high early strength • refractoriness • high abrasion resistance • resistance to biogenic sulphuric acid corrosion (BSAC)