Self-Healing Containment Gel Patches for Aircraft Fuel Cells

A fuel cell for containing fuel for an aircraft has a side wall including an innermost layer configured to contact the fuel and an outermost layer. A containment gel patch is coupled to the side wall of the fuel cell. The containment gel patch is formed from isocyanate and polyol. In addition, the containment gel patch is configured to self-seal a ballistically formed hole therein, thereby reducing leakage of the fuel from the fuel cell.