This product( Urban Decay Eyeshadow Primer Potion) is the only thing I've ever used that does what it's advertised to do. Your eyeshadow will stay on no matter what, and it will not crease.  my eyeshadow was still just as it was when I applied it. It also makes the color of your eyeshadow truer because it provides a base. I would however suggest applying it with your finger. I feel too much comes out on the wand.The shadow stays on until you take it off and stays crease free, too! The primer enhances the shadow color also. I am glad I purchased two tubes. Oh just to let people know genie-like...