Dior Rock Coat is a top coat that is applied to give a smoky effect to nail polish.
For those of you unfamiliar with Dior polishes, I wanted to mention that the square cap does come off like other square caps- Chanel, Butter London, etc. (please take a hint here, NARS!!!), and the brush was recently redesigned. I personally could almost care less about the brush, as I have used all sorts of nail polish, from 99 cents to 27 dollars, so I can make just about anything work.
The brush is wide and thick, and tapered on the ends. It is very nice, and easy to get a streak-free application. It is very similar to the Sally Hansen Pro brush, but just a tad wider. I have shown here the OPI brush for a comparison:
Now, on to the polish! I think Dior puts out really strong creme polishes- that is one of their formulas I really like. I will probably never find better cremes than some of Chanel's, but Dior's are very good.
The Rock Coat is supposed to be the next big trend, but I really was not that impressed. Kind of dulls it, and I don't really know who would go for that kind of thing. I have a lot of dark polishes- blacks, eggplants, browns, and anything in between, but they were made that way.
It seems like a lot of these trends, I jump on at the first sighting and then my excitement quicky fades when I realise, this is just not my thing. I think I prefer just plain polish- glitter would be as exciting as I can go. Don't get me wrong, I absolutely love nail art and the like, and I truly admire the talent and creativity of the artists, but I just prefer the plain.
That being said, the Rock Coat is pretty cool. The Nirvana goes from teal to a hunter green type of teal- supposed to be a blackened teal, but on my natural nails I am wearing this now, and it is a hunter green with the Rock Coat. But I really like the polish alone as well.
L: Nirvana, R: Nirvana with Rock Coat
(L: Graphic Berry, R: Graphic Berry with Rock Coat)
Nirvana was just released, as part of the same collection with Rock Coat, and Graphic Berry has been out for some time. I think Graphic Berry looks cooler with the Rock Coat than Nirvana though- it goes from a berry pink to a black cherry/burgundy shade.
I tried the Rock Coat over a glitter polish and it darkened it, but it also lost the glitter effect completely- don't care for that at all. Three thumbs down on that.
Overall, Rock Coat is a nice formula and it is 'something different'.