Product Overview With blended rejuvenating oils in a solid form the Kérastase Elixir Ultime Serum Solide 18g warms & melts into your hair, so you can smooth it over your hair, taming fly aways & frizz. Benefits Product & regenerate your hair with Kérastase Elixir Ultime Serum Solide, a solid serum that melts as you warm it, which when applied to your hair nourishes & smooths each str&. With an extremely rich formula it is perfect for applying on sensitive areas of your hair to help give it the boost it needs, to leave your hair looking & feeling gorgeous.