I'm looking for a replacement for my beloved Naked Divine Curls serum which has been discontinued...
But it's really hard finding a serum with no silicone. I avoid serum as I do a Curly Girl type thing of co-washing with conditioner etc. I liked the Divine Curls for smoothing through dry hair to get rid of frizz and add a bit of shine. I usually wash my hair in the morning but if I am going out in the evening, it usually needs a bit of a refresh and Divine Curls was perfect for this.
I love R&B from Lush. I use a wee dab mixed with Boots curl cream on wet hair, then another tiny bit on the ends if they get dry. I also mix it up with a few drops of Argan oil for a pre-wash treatment. It smells very strongly, though (like many Lush products) but I really like it.
Another great product is Davines OI all-in-one hair milk spray. It's expensive but worth it. It refreshes second-day curls and adds moisture without weighing it down - ideal for fine, curly hair.