I tried Crisco for my flat iron on Saturday and it came out wonderfully! So glad I tried it; I will be using this every time from now on. I'm just adding some info that may be useful. I paid 3 something at Stop 'n Shop for the small can. The ingredients are the same as what
KCcurly showed. I used Chi Silk Infusion and grapeseed oil underneath. My hair was blowdried first and then the Crisco was applied while being flat ironed. It was flat ironed on 378 degrees, I believe. There was no smoke, no smell, no crackling or popping. My hair is much straighter than it would be if I hadn't used the Crisco. On Sunday, I had a part in a play at my church, my hair was out and it did get noticeably bigger. I also got caught in rain drizzles Sunday night and my scarf slid off while I was sleeping (I have a satin pillowcase but I sleep crazy). I haven't touched up at all and today is day 5. YAY for Crisco!