Pyro-Putty(tm) 600 is a single part, alumina-silica filled, waterborne, high-temperature paste that can repair defects in refractory brick and other lining materials used in furnaces at temperatures to 2500 F (1371 C). It is reinforced with high-strength ceramic fibers to provide increased mechanical strength and resistance to shock and vibration. Applications can be made to repair cross-sections up to 0.5-in. thick. It sets rapidly at room temperature and cures fully at 200 F in 2-3 hours.