Creosote
/ˈkɹiːəˌsəʊt/
noun
A pale yellow oily liquid, containing phenols and similar compounds, obtained by the destructive distillation of wood tar, once used medicinally.
A similar brown liquid obtained from coal tar used as a wood preservative.
The creosote bush.
verb
To apply creosote.
“As the fence is exposed he will creosote it for protection.”