This chemical gave Eel’s body an elastic malleability, allowing him to stretch in all shapes and sizes, control his density and shapeshift, and other benefits of his strange physiology have included regeneration, invulnerability and aging at a far slower rate, if at all.
Plastic Man was introduced in 1941’s Police Comics #1 from the Quality Comics imprint, but it wasn’t until 1956 that he was acquired by DC Comics.
Originally known as Eel O’Brien, he was a small-time criminal who was exposed to an unidentified chemical liquid while pulling off a late-night heist.
However, his weaknesses include extremely temperatures (both cold and hot) and certain other chemicals.