A pre-mixed, fiber-reinforced, high temperature silicate mortar for setting, coating or repairing firebrick

Used extensively as the mortar between firebricks when building fireplace fireboxes

The i high-heat sealant for masonry-to-masonry joints less than 1/4 In

thick

Effective in resetting and cementing furnaces, stoves, chimney collars, boilers, and duct work

Not intended for exterior use