The Gamma Seal Lids that I have seen are not air tight or leakproof.
A defect in the molds from which they are made causes them to leak. They are not suitable for long term food storage. They do make it easy to get in and out of buckets and they do keep mice and insects out.
Here are links to my other videos. Please share with others.
https://youtu.be/_6E5e2cjwq8 Preppers Beware https://youtu.be/1_njpmJHCNY Danger at Sheldon Marsh part 2 https://youtu.be/P8bKJ6rx8Tw Making an Intaglio Print Part 2 https://youtu.be/dgTkpP3BWrE Making an Intaglio Print Part 1 https://youtu.be/FUFPfshPtU0 Danger at Sheldon Marsh https://youtu.be/Wry9hfg9280 The Moosie Movie https://youtu.be/SPdU0xGdMRI Plaster Sculpture