An exclusive new formaldehyde and aldehyde free smoothing system loosens curl, smoothes and softens hair, and eliminates frizz while repairing damage caused by other chemical processes. Liquid Keratin's 60 Day Straighter Smoother Stronger and Longer Treatment leaves hair looking and feeling healthier than ever before. Treatment is washed out immediately, so no more waiting 48 - 72 hours! Typical results last 2 - 3 months. Liquid Keratin is a progressive treatment with results improving with continued use. Formaldehyde and Aldehyde free. Thio Free, Sodium Hydroxide Free, Guanidine Free, Scent Free, Urea Free. Straightens and smoothes hair.