A Seaforium charge is an explosive created and used by an Engineer that will open locked doors, chests, and lockboxes depending on the level of Lockpicking skill required to open the lock. Only Engineers can use a Seaforium Charge. In general, a rogue's lockpicking skill is more convenient, because seaforium charges are used up when a lock is opened. An Engineer with some seaforium can be useful when there are no rogues around who can open the lock.