The results are instant! Sexy, shiny, easy-to-dry hair that is smooth and, depending on how strong your natural curl is, means you may no longer need straighteners. This is dependent on factors such as your home hair care….you should use the Kerasilk shampoo and conditioner to prolong the results, as using your normal shampoo will strip the keratin out quicker. We include a FREE shampoo and conditioner in our full price Kerasilk Service to maximise results for you. The process takes around 2 – 3 hours but it lasts upto 5 months.