32OZ Gray, Hi-Temperature Heavy Bodied Silicate Stove & Furnace Cement, Used To Repair Wood Or Coal Stoves, Furnaces, Fireplaces & Flues, Especially Suited For Bonding & Sealing Metal-To-Metal & Metal To Masonry Joints, Withstands Temperatures Up To 1482 Degrees Centimeter, 2,700 Degrees Fahrenheit.