This is my demonstration of applying the CURLS Gel-es-c hair defining gel/serum. It works okay to define 4b hair, but I found that it did not create as much definition as Kinky-Curly Curling Custard. It also did not give my hair very much sheen or moisture. My hair was not dry, but it was a bit crunchy. I really like the KKCC better and I recommend KKCC over the CURLS Gel-es-c for 4b hair type.
(I apologize, but I have removed the video from this post due to the darkness of the video. I will be making another video to replace this one.)