For more safety and durability I would also add additional passphrase or encryption for seed words, and use stainless steel as material of choice for your backup.
That can be just a regular stainless steel washers that can be purchased in most hardware stores, or stainless steel plates.
This should protect your assets in most cases.
Sure, metal is better than paper for durability. As far as encryption goes, yes! but many times people end up forgetting their encryption passwords or their BIP38 passphrases.
To summarise it, I think
this is one of the best articles I 've read, so I 'll let it speak instead of me.