[AlexanderHowl]

No, Sealed explicitly says that it only protects against corrosive or toxic agents that require contact with unprotected skin or machinery to have effect. It only protects against Blood Agents and Contact Agents that are corrosive or toxic agents. It also does not protect against touch attacks.

Force Field protects against Blood Agents and Contact Agents because they explicitly cannot penetrate any DR and Force Fields provide DR to every part of the body. The main reason I think why Sealed exists is because it is cheaper than the Force Field enhancement after DR 15, even though it is more limited than Force Field. Force Fields also expliciy protect against touch attacks that do insufficient damage to penetrate DR, such as an Affliction with Malediction and Melee Attack. Sealed does, however, protect after DR is penetrated or destroyed, such as when Ablative DR is depleted or when DR is corroded away.