I bought a couple of Augason Farms 45 day "Emergency Vaults" from Sam's Club when covid hit. Same purpose as you, I don't ever plan on eating them, but have them in case of SHTF. They are in an interior closet with the seals intact, so I don't know how good they are.
I've since started pressure canning which will work for a shorter term basis and I know it's as good as I make it.