The Pine Mountain® Creosote Buster® Firelog is designed with First Alert™, the most trusted brand in home safety products. Used once per season, Creosote Buster firelog reduces creosote buildup and the chance of a home heating fire, the second leading cause of home fires. Simple to use: just add to an existing fire. When heated, the powder in the Firelog changes to an active gas and attacks the creosote in the chimney. Reduces creosote in wood fireplaces and wood stoves. Removes 2 times as much creosote as the Chimney Sweeping Log (CSL). All natural, contains no wax. Patented technology.