1. Remove the label and place the unopened can or cans up to 3 or 4 at a time, in a large pot. Fill it with water until the cans are coverted by at least 2-3 inches. Cover with a lid and bring it to a boil, then reduce the heat to a simmer for 3 and a half hours
2. Remove from heat and let it cool to room temperature. You may use this immediately, or it will keep unopened on the shelf for two months

WARNING NOTE: Do not leave unattended. The can(s) must remain covered by water or risk an explosion that at the least will be messy and at worst might create injury. Monitor every 30 minutes after the first hour in case you need to top up the water level