New material being developed for spacecraft that can 'heal' itself

At the University of Bristol as part of a project with the European Space Agency, a material that has the ability to patch itself after being punctured is in testing. It works much like our skin where blood flows to the cut and hardens into a scab, but this material uses a two part epoxy to do the work. It has withstood the first round of testing but now they are trying to develop this system into stronger materials and test it against extreme heat and in a vacuum.