C-4 or Composition C-4 is a common variety of the plastic explosive family known as Composition C. The British version of the explosive is known as PE-4 (Plastic Explosive). C-4 is composed of explosives, plastic binder, plasticizer to make it malleable, and usually a marker or odorizing taggant chemical.
C-4 has a texture similar to modeling clay and can be molded into any desired shape. C-4 is stable and an explosion can only be initiated by a shock wave from a detonator.
Itami uses 72 kg of C4 to kill the Flame Dragon.
C4 blocks in real life
C4 charge in real life
72 kg of C4 used by Itami to kill the Flame Dragon