Yes but we seem to be talking about different products. Best I remember you said your safe was old and I would think from that that it is likely all steel like they used to make them. That is what I would want.
Today's fire-proof safes and especially document safes (and some gun safes too for that matter) have insulation of some sort in the walls, floors and tops unlike the older safes.
Yours may be perfectly fine but I would hate to ASSUME all modern products are created as equal.
Modern products sold as Fire proof are specifically what I have been warned against for coins but have been told they are great for documents.
Let me ask one question. What is the wall of your safe made of, inside and out and especially in between?
Do you know? I don't. Without that little piece of info seems strange to me to argue their safety for coins one way or the another. I admit I don't know but the question needs to be asked.
How one safe reacts in a fire seems of little importance to me as that is a rare occurance. How it behaves on a day to day basis and over a long term is of interest.
Dale
Safes are lined inside and out with steel so as far as I can see there is no way any fumes could escape to harm my coins. Certainly no evidence of that so far in thirty years. Likewise inside a safe a fairly constant temperature is maintained due to the insulation; this I believe has also restricted any pvc sweating etc. from this type of holder.
Both my safes are marked fireproof but that would apply to the severity of the fire, a good place in the home should be selected, mine is in a single storey part of the house against an outside wall not in the centre of the three storey part where the heat would be the most severe if the unthinkable did happen.
