Repair it the a.b.e. way DIY PRODUCT SELECTOR WOOD PRESERVATIVE carbolineum – Coal tar wood preservative. It is a blend of creosote and coal tar. Exterior use only. creosote – A dark brown to black liquid made from coal tar. Exterior use only. provonite – Anti-corrosive coal tar paint. Ideal for fencing poles, wooden sheds, windmills and pipes.