Received a sample of this several months ago, tried it a few times as a primer under my foundation, found it did nothing & discounted it. Luckily I didn't throw it out... I found it again recently & read the reviews on here regarding applying it on top of makeup. That is definintely the trick! I was worried about applying it & messing up my foundation but it's easy to just take a tiny bit & pat it on with your fingertips over your oily areas. I am normally oily on my forehead & t-zone only 2-3 hours after applying makeup in the morning. But using this product today I am at 4+ hours with no oil, just a tiny bit of shine, which is awesome!

I got this product as a sample from sephora. After I used it a couple of times I went back and bought 2 tubes of the full sized version. This stuff is holy grail. Truly.

First of all, do not use it as a base. You could, I didn't find it made any difference to my face though. It will help if you don't usually wear make up and just use it to mattify your T-zone, but the magic is when you use it over make up.

As a previous reviewer noted, you shouldn't apply it immediately after you've done your make up. As the name suggests (de-slick), you should wait until you see an oil sheen on your face before taking a small sized amount and dabbing it on. This will mattify your face and make your makeup look super fresh without having to use compact powder etc.

It's one of those products you should carry with you in your bag at all times, not something that you apply in the morning and forget about. I have seborrhea, which is basically very oily skin. I find that by dabbing this on once every 3-4 hours it keeps my make up looking very fresh. Only dab it where you need it and you'll find that this product works wonders. Also, although the price is insane, a little goes a long way and a full sized tube will last you forever.

I really didn't notice a difference with or without this primer. I didn't notice any oil control, after a few hours, or any acne flare ups. So I'm gonna give this 1 lippie for the fact that it didn't do anything and for the fact that this is really thick stuff and you have to work really quickly to blend it into your skin. Plus for the money you pay for this, there is better out there...

Really really hoped this would work. It broke me out after using it for about 2 weeks, it made make-up that I applied on top harder to blend, and it made me less oily but only for maybe an hour longer than I would normally be oily. It's still sitting in my make-up bag so maybe I'll try it again at some point. I'm using Bare Minerals Prime Time Oil Control right now, and it seems to be working better......

I use this for my nose. I like it, but be careful if you use too much then sometimes you get a white residue.

I heard so many great reviews about this product then I noticed the underlying horror stories. Despite this I purchased it from Urban Decay in Debenhams and was a little disapointed with the size of the tube for the amount of money that I paid however I was desperate for a solution to my daily touch ups. The first day I wore it I used it like a typical primer but remembering to only use a miniscule amount to avoid any odd effects that have been previously mentioned in other reviews. I gently patted it onto my face then applied my foundation and powder.... So far so good! However around 3 hours later I noticed I was getting a tad shiny for my liking and upon furthur inspection I found my foundation had 'Cracked' and was almost flaking off my skin. I instantly knew that it was the Urban Decay product because my makeup only had defects in the region that I applied the De-slick in a tube. Again the same occured the next day. I decided I would persavere and try a differant method of applying: I prepared my face as usual and then applied my foundation and set it with my powder then I very gently applied the De-Slick gel in the regions that usually get a little oily (T-Zone, Sides of nose etc) after a full day at college I found that my makeup was considerably better than the 2 previous days. By the end of the day I still had a relativly matte face with no excess oil and my makup had not cracked. Therefore I think this product requires a little percerverence till you find what works best for your skin. Obviously everybody has differant skin types etc etc so the product may work better on some skin types than others. Hope this helps x

I have pretty oily skin, and before I started using this as a primer, my make-up usually melted off my face before noon. These days, I put de-slick on under my foundation (Revlon colorstay), and my makeup is still in place when I go to wash my face at night! The most I ever have to do is powder my nose around dinnertime.

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UPDATE: I returned this today :( Sadly I was overly enthusiastic and should have given it more time. This stuff leaves a very white residuce even when I'm light handed and makes it impossible to buff in my mineral foundation. Not sure why it worked so well the first couple of times. I just don't like using it over my foundation since I wear powder.

I use this only on my nose. It helps foundation to stay on my oily nose. It works reall well. I am happy with this product overall. I wouldn't use it on my whole face though.

This does the job and worked in the high humidity. The only thing is if you use too much it does leave a chalky white residue.