Dry Mix 211®
A refractory mortar that is used for joining or repairing masonry flue tile or as a parge coating for building fireboxes. Non water soluble, this product is a 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° fahrenheit without softening. Acid resistant, meets or exceeds all the requirements of the National Fire Protection Association standard NFPA 211 and NYSCMA Tek Spec. Dark Gray color.