Dry Mix 211 is a refractory mortar 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, and it resists washing out when exposed to rain or water. Dry Mix 211 Develops a compressive strength above 2500 psi and withstands 2550° Fahrenheit without softening. Acid resistance meets or exceeds all the requirements of the National Fire Protection Association standard NFPA 211 and NYSCMA Tek Spec. Dark Gray color.
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