Preparedness blog

Why Some Food Storage Won't Last - Double Enamel Cans

By Gene from Ready Store
More from this author

In our previous installment on "Why Some Food Storage Products Won’t Last", we covered the importance of a good can seam and how a poor seam will lead to increased levels of oxygen over time which results in food spoiling early. Today we are going to look at another element of the can, the necessity of a double sided enamel coating.

Can Diagram

There are two main reasons to use a double-enameled can, first the flavor of your food is preserved by creating a layer between the steel and the food. Without the layer the food will take on the taste of the steel can over time.

The other benefit is preventing rust both internally and externally. Moisture coming in contact with metal will lead to rust which over time jeopardizes the can’s ability to create the ideal atmosphere for the food contained inside.

While double enamel cans cost more (and some companies skimp by going with a one-sided enamel) you shouldn't settle for anything less. You need to make sure that your food storage #10 cans comes with external and internal enamel coated walls so you can maximize the shelf-life of your food storage.

10 years ago
Bill Thomas
10 years ago at 3:53 AM
Which companies use double enamel cans?
Dave W.
10 years ago at 5:05 AM
I stored all my food in a water/air proof tub.I know nothing can get in.A bear couldn't get into it without the key.20 cans of food,AR-15 and 100 rounds of ammo.All locked up in a pelican 1690 Transport Case.That is just my back up plan.
Billy Lo
10 years ago at 5:22 AM
Dave W, you need more ammo in there bro.
10 years ago at 6:44 AM
Has anyone heard the buzz on the news about the BPA in the lining of cans? Is this something we should be nervous about with our long term storage cans? Does Milar bags have BPA? Thanks for looking into this stuff.
10 years ago at 7:58 AM
My son is a metallurgist for Silgan, the company that makes all the cans for DelMonte as well as Campbell and several other companies. The BPH present in any food grade can linings is only a few parts per billion. Back in the 50,s the cans had a few parts per MILLION. MUCH more BPH. There have been no proven links between that tiny amount of BPH and any illnesses, cancers, etc. regardless of what you hear in various webcasts. The research has been done, the claims are false!!
10 years ago at 8:01 AM
As Billy Lo said, Dave W, you need WAY more ammo than a hundred rounds! Try and see if you can't get at least 500 packed. I have at least a thousand though they do weigh a lot.
10 years ago at 9:46 AM
Renee, not sure if this will answer your question or not.. I live in Northern Wisconsin in an old farmhouse. My basement rarely ever gets over 60 degrees, nor drop much lower than that. It IS damp though, and I can't run a dehumidifier. What I have been doing is getting 1-gallon food storage bags (The kind that close with twisties) and putting each can into a bag. I then fold the top over and carefully seal the bag with clear carton packing tape. I've been doing this for YEARS and have never had a single can show any signs of rust. Food inside the still unopened can will not be affected. It's the temp extremes one finds by storing their food say, in the garage. THAT would make for limited shelf life and poor taste.
10 years ago at 9:50 AM
Renee, another thing.. Yes, things like bullion will become VERY hard, if not impossible to get in an emergency/survival situation. You should stock up as much as you are able. Also, imported things will be impossible to get. If you use many seasonings such as pepper, cinnamon, and other imported things, they will also be next to impossible to get. You may want to stock up on those things as well. Keep the containers out of direct sunlight, and in the coolest place you can. They should last several years that way
Carol Miller
10 years ago at 10:07 AM
Use a non-working upright freezer to store items not from The Ready Store. Line the shelves w/newspaper and keep closed for about a week to absorb any residual moisture. Then you can load it up with spices, packaged goods, mixes, etc. Best to use a vacuum sealer like FoodSaver to double seal. I have used two "dead" freezers for years, both inside and outside for safe storage. If outside, remember to lock or chain to keep little ones out. Styrofoam coolers work well also for small items and they can be stacked in a corner someplace.
10 years ago at 8:18 PM
Dave, you definitely need more ammo. That case has handles and wheels. 1000 rounds of 5.56 weighs about 29 pounds. Pack a spare bolt, firing pin, gas rings, extractor spring. Murphy's law - those little nagging items will break and keep a weapon from running. Also, don't forget some water purification device. 20 cans of food is not very useful without the water to hydrate.
10 years ago at 7:47 AM
Right now I do not believe there are double coated BPA free cans made. As Dustin was saying above, the industry is currently working on an enamel that's BPA Free, but as of yet, has not come up with one. At this point, all the lined cans have some (parts per billion) BPA in them. Back in the 50's through the early 80's, the BPA content in the coatings in cans was MUCH higher than now; in the parts per MILLION as opposed to parts per BILLION now. No ill effects were noted to the people eating foods from those cans all those years. BPA hasn't been outlawed in cans for that reason.. it's been safe all these years. BPA free enamel is still in the works; still in the development and research phases