Prioritize safes with independent certifications from UL (Underwriters Laboratories) or ETL over "factory-tested" claims.
Ensure the safe has a heat-activated seal (like Palusol) that expands to keep out smoke and hot gases. What to Look For in a Gun Safe Buying Guide how to buy a gun safe
Fire ratings indicate how long the interior remains below 350°F (the temperature at which paper chars). how to buy a gun safe
Aim for 10-gauge steel at a minimum. Higher-end safes use 7-gauge (thicker) or even plate steel. how to buy a gun safe