When you need to repair your furnace, fireplace, coal and wood stoves or flue, turn to this high temp furnace cement. The heat-resistant grey cement seals metal-to-metal and metal to masonry gaps. It heat-cures to a hard and durable finish. You can use the cement to repair air and gas leaks in the flue and the chimney. This hard-bodied stove and furnace cement doesn't contain asbestos. It resists temperatures up to 1482° C or 2700° F.