Henry, I am not sure if those boxes are fireproof, a lot of that type of thing is mainly for the security of papers and cash from being stolen but no thought of fireproofing them, if they are not fireproof then the only things that I have found to be fireproof are the small safes, so it may be a case of having one of those. I brought a small metal box with a lock on it from Australia but it is not fireproof it is only a security box. Good luck, Henry.