Dry mix in tub, light brown when cured.

It can be cast into custom shapes, used to fill large holes or cracks in masonry fireboxes, or as a solid stone bed. When this dry material is mixed with water, it chemically sets and dries rock hard.
May be used in outdoor fire pits. 12.5 lbs.
Casts a block 12″ x 12″ x 1-1/4″.
Light brown when cured.
Can withstand temperatures up to 2200°F.