Guam tar is an item used in the Hunter skill as optional bait in hunting swamp lizards. It can also be used for ammunition when the swamp lizard is used as a weapon.

Players can create guam tar at level 19 Herblore, gaining 30 experience per 15 guam tar made. This is done with 15 lumps of swamp tar used on either a guam leaf or ground guam while having a pestle and mortar, resulting in 15 lumps of guam tar.

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