This is a rather interesting article that peaked my interest near the end. Read through it and pay particularly close attention to the last paragraph and tell me that does not sound similar to the biofoam used in Halo (albeit this is more of a jelly compound).
http://www.popsci.com/science/article/2013-01/one-kilogram-new-polymer-material-can-turn-swimming-pool-jelly
http://www.popsci.com/science/article/2013-01/one-kilogram-new-polymer-material-can-turn-swimming-pool-jelly