Controls and eliminates soot buildup in the flue of a fireplace, not to be confused with Creosote Destroyer. Soot buildup can, over time, obstruct the normal passage of flue gases (smoke) and cause a chimney fire. If in doubt, use Creosote Destroyer. Using Soot-Shot improves heating efficiency by controlling soot buildup and destroying existing soot formations. Our new packaging uses 80% less plastic over the previous plastic tube and is made in the USA.From the ManufacturerControls and eliminates soot buildup in the flue of a fireplace, not to be confused with Creosote Destroyer. Soot buildup can, over time, obstruct the normal passage of flue gases (smoke) and cause a chimney fire. If in doubt, use Creosote Destroyer.