This isn't really a treatment product, but it helps my hair look better (fine, bone straight, prone to flyaways, damaged from hard water, yadda yadda yadda):
http://www.kerastase-usa.com/_.....rmique.htm
It's ridiculously expensive for a hair product (note: one tube lasts and lasts...I think I buy one every eight months or so), so I would recommend looking around for a trial size or 'travel size' if you can, so you can sort of try before you buy. After shower/bath, comb hair, put a dime-sized amount of this stuff in your hand, smear/spread a wee bit across both hands, and slick/smooth through your wet hair before blow-drying/styling. This product doesn't work very well unless you use it before heat-styling.
The Kerastase Cimente Thermique stuff is sort of a leave-in conditioner, but feels more like a styling product. The bonus is that it does *not* weigh my straight, fine hair down at all, while still smoothing/glossing or whatever. It doesn't make my hair greasy or flat, while still smoothing it nicely.
Also, a few years ago - I bought Redken "Extreme". It also worked well to help my hair after staying in a log cabin in the middle of nowhere, way up north (well-water):
http://www.redken.com/products.....-anti-snap
Same concept as the Cimente Thermique - slick some through your hair, post-shower, before styling. Leave-in, don't rinse.
Those are two things I've tried that do help. That said, I went and looked up Joico K-Pak reconstructor, and it has very good reviews on makeupalley, amazon and all kinds of places, so it might be worth a try!
Alternatively, next time you go to the hair salon for a trim or what have you, ask for a 'treatment' post-shampoo - usually a deep conditioning mask/treatment or perhaps could even be one of those protein treatments too. I've done this a few times, and while I'm not sure what it is that they're using, it sure makes a difference (for weeks and weeks too).
If you want really amazing smoothing shampoo or conditioner, try Tigi's S-Factor. For an incredible deep conditioner, try S-Factor "Serious" Conditioner. In the meantime, the "Smoothing" shampoo and conditioner are fabulous (for regular use I mean...the "Serious" conditioner is very intense conditioning and is to be used on just a once-in-awhile basis).
http://www.tigihaircare.com/co.....egoryID=15
http://www.tigihaircare.com/co.....egoryID=15
http://www.amazon.com/TIGI-Fac.....B000EMDKG0
I would try the S-Factor Smoothing Shampoo and Conditioner first - you might be pleasantly surprised at how glossy, but non-greasy it makes your hair. The "Serious" conditioner is a 'nice to have' for once in awhile. Meanwhile, the two styling products I mentioned (the Kerastase Cimente Thermique and the Redken Extreme Anti-Snap) are also handy. I'd start with the S-Factor shampoo/conditioner first though, and see if that helps.
Good luck and let us know what you end up trying that works/doesn't work.
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