It has been a long time since I wrote about the inferior insulation used on most gun safes, and the inferior way it is installed. The photo below prompted me to comment on the subject again. The picture shows a gun safe (made by the best-known manufacturer) which went through a fire earlier this year. As you can see this gun safe failed completely. The “Type X” drywall is in pieces in the safe, along with the remainders of expensive shotguns.
Brief refresher: Type X drywall shrinks and breaks into pieces when heat from a fire cooks out the moisture. Glue used to install the drywall gets soft and lets go, so the drywall caves in. That glue probably burns, too.
Do not buy a gun safe that uses Type X drywall installed with glue! There aren’t many good choices because almost every gun safe manufacturer uses this type of construction. Try Fort Knox, Graffunder and American Security’s BF line.