Description Use On Low Burning Fires In Wood Burning Systems. Effective Against Scale And Soot. Can Help Reduce The Threat Of A Chimney Fire And Increase Heating Efficiency. WARNING: This product can expose you to chemicals including Lead which is known to the State of California to cause cancer, birth defects or reproductive harm and Butyl Benzyl phthalate (BBP) which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov