Mechanic

Resistance Penetration

Penetration causes the target's corresponding Resistance to be treated as lower than its actual value by the specified amount when of calculating Damage taken from your Hits. Resistances can only be Penetrated down to a minimum of 0% by default.
0.5.4d
Current data

Catalog version 0.5.4d

No direct 0.5 patch change is linked to this page. The displayed values are current for catalog version 0.5.4d.

What Resistance Penetration means

PoE2 definition

Penetration causes the target's corresponding Resistance to be treated as lower than its actual value by the specified amount when of calculating Damage taken from your Hits. Resistances can only be Penetrated down to a minimum of 0% by default.

Since Penetration only affects Hits and applies to the target's defensive stats rather than your own offensive stats, it does not affect damage with Ailments.

Related mechanics

11 linked
01
Resistances

Resistances reduce damage taken of the corresponding damage type - Fire, Cold, Lightning or Chaos - up to a Maximum. Fire, Cold and Lightning Resistances are Elemental Resistances. Resistances can be improved with Equipment, Passives & Quest items.

02
Fire Resistance

Resistances reduce damage taken of the corresponding damage type - Fire, Cold, Lightning or Chaos - up to a Maximum. Fire, Cold and Lightning Resistances are Elemental Resistances. Resistances can be improved with Equipment, Passives & Quest items.

03
Chaos Resistance

Resistances reduce damage taken of the corresponding damage type - Fire, Cold, Lightning or Chaos - up to a Maximum. Fire, Cold and Lightning Resistances are Elemental Resistances. Resistances can be improved with Equipment, Passives & Quest items.

04
Resistance

Resistances reduce damage taken of the corresponding damage type - Fire, Cold, Lightning or Chaos - up to a Maximum. Fire, Cold and Lightning Resistances are Elemental Resistances. Resistances can be improved with Equipment, Passives & Quest items.

05
Cold Resistance

Resistances reduce damage taken of the corresponding damage type - Fire, Cold, Lightning or Chaos - up to a Maximum. Fire, Cold and Lightning Resistances are Elemental Resistances. Resistances can be improved with Equipment, Passives & Quest items.

06
Lightning Resistance

Resistances reduce damage taken of the corresponding damage type - Fire, Cold, Lightning or Chaos - up to a Maximum. Fire, Cold and Lightning Resistances are Elemental Resistances. Resistances can be improved with Equipment, Passives & Quest items.

07
Elemental Resistances

Resistances reduce damage taken of the corresponding damage type - Fire, Cold, Lightning or Chaos - up to a Maximum. Fire, Cold and Lightning Resistances are Elemental Resistances. Resistances can be improved with Equipment, Passives & Quest items.

08
Hits

Any damage that isn't damage over time is Hit damage.

09
Hitting

Any damage that isn't damage over time is Hit damage.

10
Hit

Any damage that isn't damage over time is Hit damage.