Are fireproof cabinets also waterproof?

Standard UL-tested fireproof cabinets are NOT waterproof. The fire-suppression steam produced by the insulating core can itself damage unprotected media inside the cabinet. UL's explosion resistance test and burst-pressure test verify structural integrity, not water exclusion. Waterproof fireproof cabinets (also called fire-and-water-proof safes) carry a separate water rating and are tested under water submersion. At OfficeFurniture2go.com, we carry fire-and-water-rated units for critical document storage — call 1-800-460-0858.