I am not saying this is the total answer for the seized breech plug but it is what I do and it works for me. One of the keys for success is the Breech Plug shelf in the barrel needs to be clean and not have gas cuts in the shelf.
This has worked for me for many many years....
But I have one one improvement I would also like to suggest...
This seems to be the strongest Teflon tape that I have been able to find
Another point I would like to emphasize is to double wrap the the nose of the plug and tap/push the excess down and into the nose of the plug.
One of the keys in this application is to get a positive seal on the nose of the breech plug on the shelf in the bore. Another suggestion is tighten the plug to the shelf enough to press the tape tight but not so tight that you tear the tape.
This picture is older than the hills and I need to give Underclocked the credit for the illustration.
When shooting a newly wrapped plug it is probably wise to touch off a couple of primers or caps to blow the excess tape out of the bore.