Which sealing method is also referred to as a 'double seal'?

The method referred to as a 'double seal' involves the combination of an air seal and epoxy. This approach enhances the sealing process by utilizing both air pressure and a strong adhesive material, providing a robust barrier that prevents leakage and protects the integrity of the sealed area. The air seal creates an airtight environment, while the epoxy adds an extra layer of protection and stability, ensuring that the seal is not only airtight but also waterproof and secure over time.

In the context of mortuary science, effective sealing techniques are crucial for maintaining the dignity and preservation of the deceased, making the use of a double seal particularly relevant in casket handling and burial practices. This method is preferred for its effectiveness in preventing contamination and ensuring the long-term preservation of remains.

The other choices do not accurately reflect the characteristics of a 'double seal.' For instance, air pressure alone lacks the added security that epoxy provides, while sealing a grave liner or discussing functional pricing does not pertain to the sealing methods directly related to the integrity of burial containers.