Creosote Oil

In order to preserve Wooden Ties against rot and decay we need to coat them with Creosote Oil. The particular properties of this oil derived from Coal or Wood helps to waterproof and protect wood against many forms of insects and bacteria that would otherwise destroy it in short order.

Creosote Oil is obtained by cooking 2 Coal or Wood in a Coke Oven. It is basically a free byproduct of the process. Though you will need multiple Ovens to produce it in quantity as it takes several minutes to produce and cannot be sped up any other way.

Aside from crafting, Creosote Oil can also be found in dungeons.

Usage
Creosote Oil is used to craft Railbeds, which is used to make complex tracks (from Railcraft). Note that you will also require a Rolling Machine to make rails in order to use the Railbeds effectively.

Recipe
Put Coal into the Coke Oven, and then wait until the Coke Coal turns into Creosote Oil.