MEECO'S RED DEVIL furnace cement is a pre-mixed, ready-to-use, multi-purpose, silicate product for bonding and sealing both masonry and metals with working temperatures up to 2000 deg. F. * Designed for patching or repairing cracked or chipped firebrick and mortar Effective in re-setting and cementing furnaces, stoves, chimney collars, boilers and duct work. Air cure, no heat required Total cure time of 24 hours at 60 deg. F Cleanup with soap and water To remove, soak with hot water Paintable after fully cured