Everybody is aware of the exploding red dye packs that banks throw into bags of stolen money; upon exploding, the money is permanently dyed and unusable. Now a new alternative solution has been invented, one that uses polymers, specifically polyurethanes. Apparently a quick reacting foam is created which envelopes and encases the money into an unmanageable blob. An interesting idea.
This was first reported in South Africa, which is a good thing. Here in the US, I can certainly imagine the scenario where the criminal gets some of the isocyanate on their skin, have a cardiopulmonary seizure and then they (or their survivors) then sue the bank (and their owners), the foam manufacturer (and their owners and their suppliers and the owners of the suppliers), the city, the state, and the Federal Reserve for 685 million dollars.
Tip of the hat to the Urethane Blog for the heads up.