Impregnation oil. Synonyms: creosote oil, heavy oil. It is a product of dry distillation of raw tar, belonging to the group of tar oils. It is an oily liquid, o c. on, 1,023—1,035, water content up to l%. It is used to protect the wood against the weather (water, moisture) and the action of the fungus, especially for impregnating wooden cubes, railway sleepers, telegraph poles etc.. It is also used as a raw material for the production of fungicides, and hedging. The large assortment and variety of substitute wood preservatives make it possible to replace the impregnating oil in almost all cases with other agents that are equally effective., except for protection against sea mollusk -— Teredo navalis. Package: customer's barrels or supplier's cisterns.