Malleable Physiology: Plastic Man’s powers are derived from an accident in which his body was bathed in an unknown industrial chemical mixture that also entered into his bloodstream through a gunshot wound. This caused a body-wide mutagenic process that transformed his physiology. Eel exists in a fluid state, neither entirely liquid nor solid. Plastic Man has complete control over his structure.
Density Control: Plastic Man can change his density at will; becoming as dense as a rock or as flexible as a rubber band.
Malleability (Elasticity/Plasticity): He can stretch his limbs and body to superhuman lengths and sizes. There is no known limit to how far he can stretch his body.
Size Alteration: He can shrink himself down to a few inches tall (posed as one of Batman’s utility belt pockets) or become a titan (the size of skyscrapers).
Shape-Shifting: He can contort his body into various positions and sizes impossible for ordinary humans, such as being entirely flat so that he can slip under a door or using his fingers to pick conventional locks. He can also use it for disguise by changing the shape of his face and body. Thanks to his fluid state, Plastic Man can open holes in his body and turn himself into objects with mobile parts. In addition, he can alter his bodily mass and physical constitution at will; there is virtually no limit to the sizes and shapes he can contort himself into.
Superhuman Agility: These stretching powers grant Plastic Man heightened agility enabling him flexibility and coordination that is extraordinarily beyond the natural limits of the human body.
Superhuman strength: He can alter his strength by growing or adding more muscle.
Color Change: The only limitation he has relates to color, which he cannot change without intense concentration. He generally does not use this ability and sticks to his red and yellow colored uniform.
Invulnerability: Plastic Man’s powers extraordinarily augment his durability. Some stories, perhaps of anecdotal quality, have showed him susceptible to surprise attack by bullets, in one case oozing a substance similar to liquid plastic. In most stories, though, he is able to withstand corrosives, punctures and concussions without sustaining any injury (although he can be momentarily stunned). He is resistant to high velocity impacts that would kill an ordinary person, resistant to blasts from energy weapons (Batman once mentioned that he could presumably even withstand a nuclear detonation), and is bulletproof. His bodily mass can be dispersed, but for all intents and purposes it is invulnerable.
Regeneration: He is able to regenerate and/or assimilate lost or damaged tissue, although he needs to be reasonably intact for this process to begin; he was reduced to separate molecules and scattered across the ocean for centuries, only returning to his usual form after the rest of the League were able to gather enough of his molecules and restore approximately 80% of his body mass, after which he began to regenerate what they hadn’t salvaged.
Telepathic Immunity: As stated by Batman (in JLA #88, Dec. 2003), “Plastic Man’s mind is no longer organic. It’s untouchable by telepathy.”
Immortality: Plastic Man does not appear to age; if he does, it is at a rate far slower than that of normal human beings. In the aftermath of the Justice League story Arc “Obsidian Age”, Plastic Man was discovered to have survived for 3000 years scattered into separate molecules on the bottom of the Atlantic Ocean. He is now over 3000 years old and is still active as a superhero.
Ultrasonic Detection: His body will start to “ripple” when an ultrasonic frequency is triggered.
Rubber-Organs: As stated by Black Lantern Vibe, Plastic Man’s internal organs such as his heart when Black Lantern Vibe try to rip it out couldn’t be killed unlike many of the Black Lanterns’ victims, this makes him immune to such attacks.
Skilled thief: Plastic Man was once a very talented professional thief.
Master Detective: Although no longer a criminal, he has insight into their mindset, enabling him to be an effective sleuth. He is also considered to be a lateral thinker and much smarter than he lets on.