Special cements or binders are required for use in high temperature settings. These are high alumina binders containing high percentage of alumina and other hydraulic bonding agents. These binders give good performance in castbale refractories. They provide controlled setting time and possess great compressive strength. They can withstand high temperatures up to 1800 degrees Celsius and do not crack or come off.  One such high alumina binder is GR AL 75 produced by Galaxy Enterprise. It contains high purity 75% alumina. Other major component in this binder is CaO.  It requires very little quantity of water for mixing and has a high storage life of 9 months.