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

Quenching (Major)

ITEM 14

Price 4500 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 8 (3 with particularly effective assistance).

Pathfinder Treasure Vault (Remastered)ORC