It does absolutely nothing, maybe there’s a secret way to use it, but for me it was totally useless, eyeshadows lasted 10 minutes, so I suggest to spend your money on something else.

I always used the urban decay primer potion, and although it really helped with creasing, I felt that it was drying on my eyes and could make shadows hard to blend. This one feels more lightweight, and doesn't have that crackling effect. It also makes shadows "pop" more.