This SentrySafe Fire/Water File is quite solid, heavy, and feels extremely sturdy in overall construction.  While I have not had experience with exposure of the safe to water or fire, it appears to seal quite well.  My only issue is with the latch handle, which is made of plastic and feels a little cheap.  So far it is perfectly functional, but it is not nearly as solid and durable feeling as the rest of the safe.  Overall, for the cost, I'm pleased with the purchase.