Bond Curl Rehab Salve is an intense pre-shampoo treatment, rich in proteins that target hair bonds to strengthen and repair from the inside out. Apply generously on damp hair until it is fully saturated. Leave on for a minimum of 15 minutes, (or up to 30 if you have mid-high porosity hair due to colouring, heat styling or damage). Rinse off thoroughly and follow with your favorite Curlsmith Cleanser, Conditioner and Stylers. How often to apply the treatment depends on your hair porosity. To find this out, spray water on clean, product-free hair.High porosity: water absorbs immediately in the hair. Use every 2-3 wash days for 30 minutes.Medium porosity: water forms droplets and then absorbs in the hair. Use every 3-4 wash days for 20 minutes.Low porosity: water forms droplets on the surface of the hair. Use every 4-5 wash days for 15 minutes.