Which term signifies airtight; impervious to external influence; completely sealed by fusion or soldering?

• A. Hinge Cover
• B. Hermetically Sealed
• C. Grave Liner
• D. Head Panel

Answer: (B)

Hermetically sealed is the way to express something that is airtight and impervious to external influence, achieved by fusion or soldering to create a truly leak-proof barrier. This term signals a seal that prevents air, moisture, or gases from entering or escaping, often through welded, fused, or soldered seams. In restorative art contexts, it would describe a container or closure designed to keep contents secure and uncontaminated. Other parts like a hinge cover, grave liner, or head panel describe components that don’t inherently imply an airtight seal, so they don’t convey the same level of sealing.