Editing C-7 foaming explosive

{{Ratings}}
{{Era|FS}}

'''C-7 Foaming Spray''' is a highly explosive compound that is used in demolitions by [[UNSC]] forces. It is comprised of various chemicals that react to a signal electrical current shock sent through a detonation switch. It is liquid in vacuum, but once contact with a hard surface and oxygen occurs, it becomes a foaming, semi-solid adhesive resin.<ref>[[Halo: First Strike]] page 284</ref>

==Uses==
Its most notable use is when Corporal [[Locklear]] uses it to destroy the [[Forerunner Crystal]] (the reason why the Covenant were chasing them), leading to his death.<ref>[[Halo: First Strike]]</ref>

==Trivia==
*In the present, there is a very effective explosive called C-4, possibly a precursor of C-7.
*C-4 is short for "Composition 4", therefore it is likely that C-7 means "Composition 7." It is also likely that it is simply a codename based the order in which it was developed, not an indicator of its explosive power (i.e. being 1.75 times as powerful as C-4).
*It is mentioned only once when [[Master Chief]] talked about his training as a [[Spartan-II]].
*The most likely reason C-7 was developed was so that the users would be able to simply spray it onto the surface.
*C-7 is another reference to [[7]].
*In [[Halo: Fall of Reach]], Samuel-034 used C-7 to destroy an airlock while trying to capture a rebel leader.
*The properties of C-7 are more than likely similar to the yellow expanding foam used for insulation and sealing in construction.

==Sources==
<references/>

{{UNSC Infantry Weapons}}
[[Category:Human Weapons]]
[[Category:UNSC]]
[[Category:Weapons]]
[[Category:Human]]
[[Category:Technology]]