Airproof vs. Airtight
Difference Between Airproof and Airtight
Being impermeable to air or other gases.
(transitive) To make airtight.
(figuratively) Having no weak points or flaws.We have an airtight argument they won’t be able to punch holes in.
Highly reserved in some matter, particularly tight-lipped or tight-fisted.
having no weak points;an airtight defensean airtight argument
not allowing air or gas to pass in or out