Stats Guide - Elemental Resistance

The Elemental Resistance stat has 6 variations, which are the same than the Elemental DMG stat.
They are the counter stat of the Elemental DMG.

Having an equal or upper value of elem. resist. than the enemy's elem. damage will result in reducing this enemy's extra elem. damage to 0. If the enemy still has few elem. damage remaining despite your resistances, he will keep dealing some extra elem. damage to you.

As stated in the soulstones' guide, the elemental resistance doesn't proc against neutral enemies. Thereby, there is somewhat no use of this stat outside from Golden Citadel, the 4 rookie raids (in elem. mode) and PvP areas (considering the enemy runs with soulstones on his weapon).