The gels immediately wash off in water or Cleansing Gel.Д®ach gel (apparently) has a harmful effect to it. If one type of gel is poured on top of another, it coats the earlier one, negating the properties of the first in favor of its own. They will stick to any solid surface, imparting their properties to that surface. This paragraph is still under construction.ДЄll four gels share similar properties. With having painted Cleansing Gel onto a surface, will automatically wash off any type of Gel on that said surface. The fourth and final kind of gel is the Cleansing Gel. Being a 'good portal conductor' as Johnson put it, it converts any surface into a portal surface. It is first found when Chell and GLaDOS are making their way through Aperture's third Test Sphere, where Aperture scientists were testing the gel. Cave decided that testing with this gel will somehow give the scientists a cure for Cave's illness. The gel, however, proved to be an excellent portal conductor. In doing so, he was fatally poisoned by moon dust. It was developed on impulse by Johnson he purchased $70 million worth of Moon rocks and turned them into a gel with similar properties to the company's previous two gels. The third kind of gel encountered is the Conversion Gel. As the name implies, it causes people and objects to move at high speeds while walking/running on it. It is first found when Chell and GLaDOS (still inside a potato after Wheatley's betrayal) make their way through Aperture's second Test Sphere, where (presumably) homeless people were offered $60 to for participation in various tests one of which was the Propulsion Gel.

The second kind of gel encountered is the Propulsion Gel. As the name implies, it causes people and objects to bounce off of it. It is first found when Chell is making her way through Aperture's first Test Sphere, where (apparently) war heroes, astronauts, and Olympians were hired to participate in various experiments one of which was the Repulsion Gel. The first kind of gel encountered is the Repulsion Gel.

Portal 2 adhesion gel