I'm specialist in Brazilian blowdry for 7 years able to traine and recommend the best to use

Marcio, I am curious why you dislike Global Keratin? Do you like INOAR , LISIM (by di Belle) or 4HAIR? I would love to hear of your experiences with different product ranges. Thank you for sharing your knowledge.

the Brazilian Blowdry is a keratin treatment that repairs ur hair and straighter, can not be sold as a straightening process because it doesn't change the hair structure, only works on the damage cuticle and fill the gap where it's missed.
I recommend in America, MARCIA TEIXEIRA or ONIX HAIR CARE, as I said before I do this treatment for 7 years, have used about 18 different brands, and have seen the tecnology progress of the system.
Everyone has a different result but always positive and has best result in colored or chemicaly damaged, and can last from 2 to 4 months varying accordly with the hair texture, amount and level of damage.
I don't recommend only watching videos, buying the product and applying coz, u can burn the client scalp coz of the steam, over apply the lotion or do not do it propperly, I entirely recommend to fallow the company who suplys it's instructure as every company has a different step and formulation.
The after care is very important to make it last, not washing too often and using soulfate free range will be essencial, I recommend some ranges which provides the shampoo and conditioner, sometimes a serum, but is not needed and also oils can coat the treated hair and will make it greassy , ones oily, u need more shampoos to remove it, and it wont last as long as it should.
TIGI rockaholic
Brocato - the entire range is soulfate free
U can find on internet a big amount of different brands, but i personaly recommend those, Redken is great but contains soulfate, if u do not find any, Clear moisture would be the best one in my opinion.
Hope I didn't confuse u... if u have a question, don't resitate...
Marcio