Straightening Serums?

[Deep Brunette]

What's the best product to put into my thick, curly, frizzy hair before using my Sedu straightener on it? Please help!

 

[oona]

I use Zero Frizz. You can purchase from Walmart, CVS, Walgreens... other drug stores for about $7. One bottle of the serum lasts me about 5 months & it smells nice.