Creosote particularly used in dentistry to destroy tissues and arrest necrosis. Coal-tar creosote is the most widely used wood treatment today; both industrially, processed into wood using pressure methods such as "full-cell process" or "empty-cell process", and more commonly applied to wood through brushing. In addition to toxicity to fungi, insects, and marine borers, it serves as a natural water repellant. It is commonly used to preserve and waterproof cross ties, pilings, telephone poles, power line poles, marine pilings, and fence posts. Although suitable for use in preserving the structural timbers of buildings, it is not generally used that way because
Oil sands to asphalt than to coal tar, and the term "oil sands" (or oilsands) is more commonly used by industry in the producing areas than "tar sands" because synthetic oil is manufactured from the bitumen, and due to the feeling that the terminology of "tar sands" is less politically acceptable to the public. Oil sands are now an alternative to conventional crude oil. In Canada, the First Nation peoples had used bitumen from seeps along the Athabasca and Clearwater Rivers to waterproof their birch bark canoes from early prehistoric times. The Canadian oil sands first became known to Europeans in 1719