Coax the very best out of your curls and coils with the Redken Acidic Bonding Curls Silicone-Free Leave-in Hair Treatment. n Powered by Curl Bond Technology featuring 16% citric acid, glycine and urea, the potent formula glides through lengths and ends to help visibly strengthen and repair each strand, while a blend of avocado and coconut oils lock in lasting hydration. Topped with heat protection up to 230C, the leave-in treatment effortlessly detangles and smooths to enhance your natural curl pattern, leaving curls feeling light and soft without any residue.