Conversion Gel

Conversion Gel.

“

First up, conversion gel. [cough] Click to listen — Cave Johnson

”

Conversion Gel is a white gel that enables any surface to have portals placed on them, even if they are not normally portal-conductive.

According to Cave Johnson, conversion gel is made from ground-up moon rocks, which make a great portal conductor. This is shown when Chell fires a portal at the moon near the end of the game, despite the non-flat surface of the moon. Unfortunately, long-term exposure to ground up moon rocks led to Johnson's poisoning and eventual death. He attempted to fashion a cure by forging a gel out of the rocks, in hopes it would "leech the lunar poison out of man's bloodstream."

Related achievements

White Out Complete the first Conversion Gel test

Trivia

• This is the only type of gel that doesn't appear in the multiplayer.