I have been using Waterlox for many years and used several ways to store it to keep it fresh. Adding marbles to fill can, co2 to push out air and none were 100 % effective. One day my wife was canning fruit in 1 pint jars and evacuating air with a vacuum sealing machine. Behold what a concept. So now I buy Waterlox in one gallon cans (way cheaper) and it will fill 9 pint jars vacuum packed. No more gooey Waterlox now.