Sure why not?? It makes it extra shiny. I put a LIGHT pomade on my hair when it's wet (don't overdue it or else you'll have the "greasies"). Then blow dry and either put the shine serum on before I straighten or after. It seems to make no difference.
Thats how i do it and it makes my hair really shiny and soft. How long is ur hair? For a guy i use flat iron i mean? Like is it to spike it or straighted it?