Keratin Complex Express System Kit The Keratin Complex Express System Kit a quick, add-on in-salon service that locks in hair color, smoothes, boosts shine, increases manageability and combats frizz, among other healthy hair benefits. Not only will clients leave the salon with brilliant, sleek hair that will last for up to six weeks, but it is also the most affordable way for a client to receive a smoothing treatment. This color-locking, speedy smoothing solution is an express service that delivers polished, more manageable hair with results that last up to 6 weeks. takes 15 minutes when added to a color service or just 1 hour when used as a standalone service. Included: 1x 4 fl. oz. KC PRIMER Keratin Pre-Treatment Shampoo 1x 4 fl. oz. KC Express Blow Out Smoothing Treatment 1x 5 fl. oz. Keratin Obsessed Multi-Benefit Treatment Spray