there is a company i dont no the name but i thank rockler has it it is a can of argon gas that you spray in your can and it moves the oxygen out because argon is hevyer then oxygen it is what the cans of paint ,stain or any thing like it come from the factory with in it so it does not have a shelf life you can store it forever i will fined the name and post it today or if you have a tig welder you can just run some gas in to your can from it