You can try the in-expensive K-Y Jelly.
Or Curl Keeper which you can find at Curl Mart.

I think those two will have the serum texture you're looking for...

3a/3b

Latest routine:
Sauve Coconut CO
Or
Trader Joe's Nourish
Giovanni 50/50
Giovanni Direct Leave In
JoicoWhip
Newest Fav: Curl Junkie Coffee-Coco Curl Creme
~~~~~~~~~~~~~~~~~