Features: * Non-water soluable * Used for joining or repairing masonry flue tile or as a parge coating for building fireboxes * Hydraulic set mortar that does not require heat to cure * Resists washing out when exposed to rain or water * Develops a compressive strength above 2500 psi and withstands 2550-degrees Fahrenheit without softening * Meets or exceeds all the requirements of the National Fire Protection Association standard NFPA211, 1988 edition * Covers 1268 sq in at 1/8 in. thick, enough for approximately 50 clay flue tiles, 8 in. x 8 in., or 30 firebrick, 4-1/2 in. x 9 in. * 10-lb. size What"s In The Box: * Rutland 211 Refractory Cement Dry Mix - 10-Lb