When I straighten my 3B hair, it always has some body. Sometimes I think it looks "amateur," since I can't make it "sleek."

I used a T3 Singlepass for a few weeks and didn't like it. I even used its highest setting (450 degrees), and my hair curls in 30 minutes.

My friend said I needed to moisturize more and that my hair curls up from trying to take in extra moisture. She suggested using coconut oil PRE-shampoo and leaving it for up to 14 hours. Currently, I use DevaCurl products, so no silicones, sulfates, or parabens. And a heat protectant when straightening.

What's wrong? My moisture-process or the iron itself? I hear the flat iron, itself, makes a difference. So, far I ruled out T3. I know Sultra and GHD are raved about. Not sure if either makes a difference in my case?
Originally Posted by DNAHelices
Moisture = water, if your hair is reverting then it either was not dry enough in the first place or is absorbing water from the atmosphere - if you have high dew points/ humidity likely nothing will get your hair to remain straight except relaxing. Devacurl is loaded with glycerin, that is a heat protectant but holds a lot of water which may make it tough for you to get bone dry hair.

Very high heats will not prevent that they just damage the hair permanently. Try starting out with hair that has been air dried as straight as possible, eg. wet wrapping.
THE NATURAL HAVEN: Straightening Facts :How hot is too hot?

Coconut oil does not supply moisture, it's the opposite of that being an anti humectant/ occlusive/ sealant. Used as a overnight pre-wash it can certainly reduce porosity and increase elasticity, which means over time the hair will take up less moisture.
Mineral Oil Versus Coconut Oil: Which is better?
Porosity and Curly Hair

What is in your heat protectant if not silicones?
THE NATURAL HAVEN: Thermal protection: Do they really work?
hair hot iron damage
How To Protect Your Hair From Heat Damage
2a-2c, medium texture, porous/ colour treated. Three years CG. Past bra strap length heading for waist.

CO-wash: Inecto coconut/ Elvive Volume Collagen
Treatments: Komaza Care Matani, coconut/ sweet almond/ fractionated coconut oils, Hairveda Sitrinillah
Leave in: Fructis Sleek & Shine (old), Gliss Ultimate Volume, various Elvive
Styler: Umberto Giannini jelly, Au Naturale styling gelee
Flour sack towel, pixie diffuse or air dry.
Experimenting with: benign neglect