Akona 104319 Medium Duty Refractory Mortar 50 lb

Medium-Duty Refractory Mortar 50 lb

Akona 104319 is a dry, preblended mortar designed for setting masonry units in fireplaces, fire pits, BBQs, and chimney applications such as clay flue liners. It is air-entrained for freeze-thaw resistance and offers high strength with a one-hour working time. The product withstands temperatures up to 2,550°F and meets ASTM C199, C1283, and E136 standards. It carries a California Proposition 65 warning for reproductive harm.

Suited for masonry projects needing heat resistance

This mortar suits builders and homeowners constructing or repairing outdoor or indoor fireplaces, fire pits, barbecues, and chimney flue liners where sustained high temperatures occur. It is not intended for structural load-bearing walls, general-purpose bricklaying below grade, or applications requiring acid resistance or rapid setting times beyond the one-hour window. Buyers needing a waterproof sealant or a non-refractory adhesive should look elsewhere.

50 lb bag capacity for standard hearth work

The 50 lb bag provides enough material for typical residential firebox, fire pit, or flue liner installations, covering several square feet of joint area depending on unit size and joint thickness. It comfortably handles continuous exposure to 2,550°F and freeze-thaw cycles. The supply runs out on large commercial chimney relining jobs or projects requiring thousands of pounds of mortar, where pallet quantities become necessary.