Creosote's the name used for a variety of products including wood creosote and coal tar creosote. Wood creosote's created by high temperature treatment of beech and other woods, or from the resin of the Creosote bush. The term creosote, however,'s most commonly used to refer to coal tar creosote. Coal tar creosote's an EPA-registered wood preservative. It's distilled from crude coke oven tar, and's mainly composed of polycyclic aromatic hydrocarbons (PAHs), but also contains phenols and cresols… (More on Creosote)