Pre-mixed, ready-to-use high temperature silicate formula. Multi purpose cement 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. Not suited for outdoor use. Cure time: 24 hours at least 60 Deg. F. Paintable after fully cured.