Tarromin tar

To make Tarromin tar you need a herblore level of at least 3*.

Guam tar can be made by doing the following steps:
 * Get Swamp tar (For example at Lumbridge Swamp or Mort Myre swamp)
 * Get a Pestle and Mortar
 * Get a Tarromin

If you've got all these in your inventory, use the Tarromin with the swamp tar, and voila. You'll get 15 Tarromin tar for every Tarromin.