Repair Therapy. Rebuilds Elasticity & Tensile Strength to Hair. Reduces Breakage in One Treatment. Repairs Chemically Damaged Hair Delivers over 25% of pure Keratin Protein to rebuild the hair s tensile strength and elasticity. Through the use of electrostatic penetration, the Keratin fuses to the existing protein bond revitalizing extremely damaged, color treated and chemically compromised hair. Intense RX is infused into the hair shaft by the use of a blow dryer or a flat iron. After just one application, watch your hair shine! .