How do hot gel packs work?
How do hot gel packs work? When the aluminum button of the activator is clicked, it creates a physical chain reaction causing the liquid to crystallize and generates heat. The heat is generated as the liquid converts to a solid. When you boil the heat pack in its solid state, the crystals melt and will eventually turn into a liquid pack. How long does click heat last? How long does the heat last once clicked? The heat will last between 30 to 90 minutes depending on the size of the pack and up to 120 min by insulating it with...