JB Weld

A place to start is a "Material Safety Data Sheet" for the specific product you are considering. Google "MSDS JB Weld".

If nothing else, you may end up ruling out some of the products.

It's an epoxy, it might be toxic…..maybe others will chime in.

There are food grade epoxys out there. I doubt if JB Weld products undergo that testing, but some might be innocuous.

I looked up a little more info on this and decided to go for it.

Came out to be 21 grams with the ability to boil 15 ounces.

Entire cook system with mini bic (not pictured) is 1.7 ounces.

Hoping 2 of the 4 gram esbit tabs will boil this.
This can take off a lot more weight.
Small esbits don't smell much either so it's another big plus.

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Check out JB Waterweld, listed as safe in potable applications.

Flex it and see if it stays on. My guess is that it will last a short while before catastrophic failure. Be safe. JB weld dries solid and unyielding. I think I would try stainless HVAC tape

There are small aluminum cans of this volume, and you wouldn't have to use epoxy to join anything.

–B.G.–

JB weld is great stuff,but its not food grade material. I'd glue stove parts together with it , but not a cooking vessel.

I think a safer and more durable way long term to achieve your goal would to cut down a Fosters can to the appropriate height and simply press fit a reinforcing top ring made from an appropriate sized can.

It will get you to your weight and the entire pot chamber will be one piece- no glue line. Also, due to the short can height and the stout rim ring at the top it will be plenty stiff.

A few years ago a Youtuber named Intense Angler did a video of installing such a DIY pot ring in a Fosters can-

http://m.youtube.com/watch?v=cU77XQpjrdI

I made one using his method and it works fine.

"Normal" epoxies are carcinogens.

The repeated heating of the can WILL break the epoxy bond in short order.

There are coffee cans about that size. Why kluge this together with JB Weld?

You’re saving 7grams for a weakened pot.

Zelph 2-Cup Fosters

I would also be worried about the lining of the can – these are known to contain BPA and releasing it when heated. Not to mention the bad smell – I only tried once to heat water in a beer can and the smell was horrible – nobody could convince me to drink the heated water from that can.