Assembled Product Length: N/A Assembled Product Height: N/A Assembled Product Width: N/A Diameter: N/A . Use when installing or resetting furnaces or oil burners Use to fill gaps between masonry and metal Prevents air and gas leaks in flue and chimney joints Can be used on cast iron, steel or firebrick Non-asbestos Spreads easily Superior bonding strength Bonds and seals metal-to-metal and metal to masonry joints under 1/8" Durable as firebrick when heat cured Resists temperatures up to 1093 (2000) 473 ml