{{Article|p2|ld}}
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{{Technology Infobox
| image=FileRepulsion gel.svg|250px
| image2=FileRepulsion.jpg|250px
| name=Repulsion Gel
| affiliation=Aperture Science
| type=Liquid fiberglass insulator
| maker=
| usedby=*Chell
*ATLAS and P-body
| entity=paint_bomb_jump
| designer=Pongthep Charnchaichujit (original design)https//www.digipen.edu/studentprojects/tag/ ''Tag The Power of Paint'' official project page
| voicedby=
| hidei=
| hideu=
| hideg=
}}
{{Quote|Last poor son of a gun got blue paint. Hahaha. All joking aside, that did happen - broke every bone in his legs. Tragic. But informative. Or so I'm told.|Cave Johnson|Portal 2|Filefifties repulsion intro03.ogg}}
'''Repulsion Gel''', also known as '''Bounce Gel''', is a CategoryAperture Science testing elements|testing element used in the Aperture Science Enrichment Center|Enrichment Center several decades before ''Portal'' and introduced in ''Portal 2''. It is one of four types of Mobility Gels.
==Overview==
FilePortal2 2011-05-27 23-23-16-18.jpg|thumb|200px|left|Repulsion Gel dripping from a vent in Sphere 02's Test Chamber 01 in Test Shaft 09
*Used as far back as 1953 by Aperture Science, Repulsion Gel is the company's first attempt at a dietetic pudding substitute. The gel, a bright blue color, is said to be a sweeter, slightly less non-toxic form of fiberglass insulation. Its purpose was to cause subsequently ingested food items to bounce off the lining of the dieter's distended stomach and out of their mouth. However, for various reasons, the product was also pulled from the shelves like the Propulsion Gel, and reconverted into a testing element for use with the Aperture Science Portable Quantum Tunneling Device, the forerunner of the Aperture Science Handheld Portal Device. The material was eventually deemed hazardous even by Aperture Science's standards, and sealed away in Test Shaft 9 along with the Propulsion Gel and Conversion Gel, before the shaft was opened by Chell in order to escape from it. During the escape, she activated the pump stations containing the gel, and finally opened the main hatch between Test Shaft 9 and the main facility, allowing the Gels to once more become available in the facility.http//www.youtube.com/watch?v=vZxXth2HaVw Repulsion Gel demonstration on Combine OverWiki's YouTube channel
*When coating a surface, Repulsion Gel will cause Test Subjects to bounce off the surface. Standing on the gel and jumping will cause them to be bounced approximately 2.5 times their normal jump height.''Portal 2 Collector's Edition Guide'' Falling onto the gel form a height will cause them to bounce slighty higher than the drop height. When placed on the walls, the gel will bounce them horizontally.
*When bouncing off Repulsion Gel, the angle at which a Test Subject hits the gel is the angle at which he or she is bounced off - for instance, hitting the gel at a 45 degree angle will bounce the Test Subject at a 45 degree angle. While bouncing, Test Subjects have a small degree of air control, which they can use to influence where they land by moving theirselfes in the desired direction.
*During a pre-recorded message in a test chamber, Cave Johnson instructed the Test subjects that they should, under no circumstances, get covered in repulsion gel. Aperture Scientists were not able to identify what element repulsion gel was except that it "was a lively one that does not like the human skeleton". Despite this, getting covered in repulsion gel in the game will not harm a human or robot player character.
*As a testing element, Repulsion Gel, coming as single blobs or continuous streams through a vent, transfers its properties to any object it touches, giving them a trampoline-like surface. After coating parallel walls on either side of a large pit, a Test Subject ricochets back and forth across the gap. Plastering Repulsion Gel all over a Weighted Storage Cube causes it to barrel across the room, shattering glass and taking out Aperture Science Sentry Turret|Sentry Turrets in its path.http//gameinformer.com/mag/portal2.aspx Game Informer, April 2010 issue Portals can also be shot under Repulsion Gel vents, allowing the gel to be sent in any area of a Test Chamber.
*It is possible to cover Aperture Science Sentry Turrets with the gel, causing them to bounce around, effectively deactivating them.
*"Repulsion Gel" is a registered trademark of Aperture Science.
==Related Achievements==
{|class=wikitable style="vertical-aligncenter;" width=100%
|-
!colspan="2" style="text-alignleft"|''Portal 2''
|-
|rowspan=2 width=64px|FileBLUE GEL.jpg
!style="text-alignleft"|''Vertically Unchallenged (15G)''
|-
|Master the Repulsion Gel.
|-
|rowspan=2 width=64px|FileCATCH CRAZY BOX.jpg
!style="text-alignleft"|''Schrodinger's Catch (20G)''
|-
|Catch a blue-painted box before it touches the ground.
|-
|}
==Behind the scenes==
FileRepulsion gel portal.jpg|left|thumb|200px|A portal is sent into Repulsion Gel by the ASHPD.
*The Repulsion and Propulsion Gels were first introduced as unnamed paint types in the April, 2010 issue of Game Informer. Gameplay footage and their proper name was revealed during E3 2010.
*So far the expanded gameplay produced by Repulsion Gel and Propulsion Gel alone appears to be extremely satisfying, and Valve indicated a willingness to include more if it sees fit.
*Repulsion Gel mirrors directly the green paint featured in the student video game ''Tag The Power of Paint'', as the whole team was hired by Valve to develop it for ''Portal 2''.http//www.shacknews.com/onearticle.x/62689 Valve Hires DigiPen Team; Seemingly for Portal 2 on Shacknews The original ''Tag'' paint was developed by Pongthep Charnchaichujit.
*There was a Repulsion Gel chamber prior to release that many people think did not make it into the retail game, when it actually did. It is one of the last chambers of the Repulsion Gel-only levels. Many people do not recognize it because it has been changed in look to match the old facility, and an Aperture Science Material Emancipation Grill was added in front of the ramp.
*While Repulsion Gel was made around 20 years before Propulsion Gel, it hit shelves after Propulsion Gel. Also, there is a face placard about Repulsion Gel saying that is was Aperture's first attempt to create a dietetic pudding substitute, while demonstrational videos say that it was second attempt.
==Trivia==
*It's revealed in ''Portal 2'' that the three gels were simply not connected to the more modern Aperture facility, explaining why they weren't encountered in the original ''Portal''.
*While the animated diagrams of the Propulsion and Repulsion Gels show them to be contained in buckets, this aspect was not seen in-game.
*The Repulsion and Propulsion Gels use the same colors as that of the ASHPD's Teleportation|portals (blue and orange, respectively).
==Gallery==
===Pre-release===
FileRepulsion diag.jpg|Repulsion Gel diagram.
FileRepulsion Gel blob.jpg|A Repulsion Gel glob about to crash on the ground.
FileRepulsion gel.jpg|A glob bursting after hitting the ground.
FileRepulsion wall jumps.jpg|Jumping on walls thanks to Repulsion Gel.
FileRepulsion gel early.jpg|Repulsion Gel.
FileRepulsion gel effect.jpg|The Repulsion Gel effect.
===Retail===
FileGel flow blue.png|"Gel Flow" direction sign.
FileSignage paint jump 50s.png|Repulsion Gel sign.
FileUnderground repulsion.png|Repulsion Gel fact placard.
FileGel pressure control blue.png|Blue "Gel Pressure Control" notice on the console in Pump Station Alpha.
FileSignage paint jump.png|Modern Repulsion Gel sign.
FileSp_a3_speed_ramp0002.jpg|Repulsion Gel sprayed on a wall.
FilePortal2 2011-05-28 22-59-24-35.jpg|Being covered with Repulsion Gel in Test Shaft 09.
FilePortal2 2011-05-27 23-04-06-37.jpg|Repulsion Gel seen in the 50s area of Test Shaft 09, with Aperture Science Switch.
FilePortal2 2011-05-27 23-12-02-39.jpg|Ditto, with 1500 Megawatt Aperture Science Heavy Duty Super-Colliding Super Button.
FilePortal2 2011-05-27 23-12-41-51.jpg|Ditto, sparayed on the walls.
FilePortal2 2011-05-27 23-23-57-90.jpg|Ditto, being conveniently placed with the use of portals.
FilePortal2 2011-05-27 23-25-31-56.jpg|Ditto, after throwing it in the needed spots in Test Chamber 02.
FilePortal2 2011-05-28 21-06-42-26.jpg|Ditto, test Chamber 28 with the Repulsion Gel on the right.
FilePortal2 2011-05-28 21-16-53-78.jpg|Ditto, the Repulsion Gel-covered Weighted Companion Cube bouncing around.
FilePeti paintsplat bounce.png|Repulsion Gel icon in ''Perpetual Testing Initiative''.
==List of appearances==
*''Portal 2'' {{1st}}
*''The Final Hours of Portal 2''
*''Peer Review''
*''Perpetual Testing Initiative''
*''Lego Dimensions'' {{Nc}}
==References==
{{Imagecat|Repulsion Gel images}}
{{Reflist}}
==External links==
*{{YouTube|vZxXth2HaVw|First demonstration video}}
*{{YouTube|LejMh4EHpG4|Second demonstration video}}
{{Technology}}
{{Aperture}}
CategoryAperture Science technologyCategoryTechnologyCategoryPortal 2CategoryAperture Science testing elementsCategoryMobility GelsCategoryFood
