From Pathfinder Treasure Vault (Remastered), which isn't enabled.

Quenching (True)

ITEM 18

Price 24000 gp

Usage etched onto armor

Bulk —

This rune counters burning and corrosive agents. Armor with this rune reduces the DC of the flat check to end persistent acid or fire damage affecting you from 15 to 5 (particularly effective assistance automatically removes the persistent acid or fire damage).

Pathfinder Treasure Vault (Remastered)ORC