Wood preservation a long-practised method and often used in today's carpentry workshops. Technological developments mean it is also possible to spray preservative over the surface of the timber. Some of the liquid is drawn into the wood as the result of capillary action before the spray runs off or evaporates, but unless puddling occurs penetration is limited and may not be suitable for long-term weathering. By using the spray method, coal-tar creosote, oil-borne solutions and water-borne salts (to some extent) can also be applied. A thorough brush or spray treatment with coal-tar creosote can add 1 to 3 years to the lifespan
Tar "Burmese Oil" or "Burmese Naphtha", is also a form of petroleum. Oil Sands, almost exclusively produced in Alberta, Canada is colloquially referred to as "Tar Sands" however the oil sands is composed of bitumen. Note, similar heavy crude grades from Venezuela are not referred to as "Tar Sands" by Wikipedia or the environmental community. In Northern Europe, the word "tar" refers primarily to a substance that is derived from the wood and roots of pine. In earlier times it was often used as a water repellent coating for boats, ships, and roofs. It is still used as an additive in