What term means airtight and impervious to external influence, completely sealed by fusion or soldering?

• A. Head panel
• B. Hinge skirt
• C. Header flange
• D. Hermetically sealed

Answer: (D)

A hermetically sealed material or container is airtight and impervious to anything from outside. It means the item is completely closed off so air, moisture, and contaminants cannot enter, and nothing inside can escape. Achieving this requires joining the materials so the seams are fused or soldered, leaving no gaps or porosity. In funeral service practice, this term describes containers or closures that must maintain a controlled, contamination-free environment, protecting contents and preventing leakage. The other terms refer to physical parts of a casket rather than the sealing quality, so they don’t convey this airtight, fusion-sealed concept.