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Dry Mix 211®

by Rutland

RUTLAND Dry Mix 211® is a refractory mortar ideal for joining or repairing masonry flue tile in any gas or wood fireplace and wood, coal, or pellet stove chimney. Just add water, mix, and trowel on to seal and join flue tiles. It can also be used as a parge coating (thin overcoat) when building fireboxes to give your fireplace a nice, even, dark gray finish. Does not require (but is stronger with) heat curing. Meets NFPA 211 standards and NYSCMA Tek Spec 4.0.

  • 10 lb Tub
  • Rated up to 2550°F (1400°C)
  • Approximate coverage: 50 8″ x 8″ flue tiles or 30 9″ x 4-1/2″ x 1-1/4″ firebricks (1,270 sq in, 1/8″ thick)
  • Can be painted once dry
  • Indoor use only
  • Made in the USA


Mix dry material with enough clean, cool water to make a workable mortar. One quart water to 10 lbs mix is recommended. If mortar is too dry, add 1/2 cup water. Mix well. Mortar has a pot life of about 1 hour, but less in hot weather. Set time is approximately two hours, less at temperatures above 80°F. Air dry for at least 24 hours before applying heat.

Safety Data Sheet


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