The Keratin Treatment with Brazilian Blowout is an in salon treatment that takes about 90 minutes for shoulder length hair. Treatment smooths the hair and leaves it looking radiantly shiny, smooth, soft and healthy for up to 12 weeks. The treatment seals in the cuticle which cuts drying time down to 1/3 of the usual time, i.e . Hair that used to take 30 minutes to blow dry, now takes 10 minutes. This treatment also gives you the option of air drying your hair to look smoother and beautiful.