I use it to put down mole holes -they soon disappear , also good if you mark your perimeter fence posts around your hen houses (foxes don't like it), I used to dip 8" pieces of old ratchet straps in it and tack it onto the bottom of fence posts.
There use to be a substance that smells very like creosote, which used to be used by gamekeepers, but for the life of me I can't remember what it's called, but it's banned now.
G