Experience professional-grade hair restoration with the K18 Professional Molecular Repair Hair Mask. Engineered with patented K18PEPTIDE™ technology, this innovative leave-in treatment works at the molecular level to reconnect polypeptide chains and disulfide bonds broken by bleaching, chemical services, heat, and mechanical styling. In just 4 minutes, it reverses damage, restoring strength, elasticity, softness, and bounce to your hair. Suitable for all hair types, this highly concentrated formula provides immediate and lasting results, leaving your hair feeling like new without the need for rinsing.