Keratin Complex KCMAX Maximum Keratin Smoothing System: Pre-Treatment, Shampoo, Smoothing Treatment, and Treatment Spray 33.8oz-Kit is the newest addition to the Keratin Complex Smoothing Treatment Family. Created with all natural keratin, to help maintain your hair healthy, luminous and full of shine. This is your go to for when you want the straightest possible results! This treatment lasts up to 3 months. The KCMAX Smoothing System involves three steps, Clarifying Pre-Shampoo, Maximum Keratin Smoothing Treatment, and KCMAX Maximum Keratin Treatment Spray.