Refractory Mortar is a 3200°F (1760°C) wet, air-setting, thick patching mortar. It has high strength, can withstand high temperatures and has negligible shrinkage. Typical applications include boilers, brick plants, steel mills, asphalt plants, iron foundries, and as a protective coating over ceramic fiber modules. It is used as a brick joint mortar, as well as for repairing cracks and joints in boilers, industrial furnaces, kilns, flues, and stacks or other high temperature fireboxes.