Yes, it’s the binary seed, read in the order you select. Each side is numbered in binary at the bottom.
How to convert to a seed phrase/how to do it manually is here, but we’ll see if we can make it more direct:
https://www.modulo.network/_files/ugd/19dc64_613aeae368634024ac4c6051a9616334.pdf
Great suggestion about the epoxy—we leave it to the buyer how to lock it down but might add it as an option in the future.