OLAPLEX No. 0 Intense Bond Builder is a professional-inspired treatment designed to strengthen and repair damaged hair from the inside out. This highly concentrated formula primes your hair for deeper repair, working as the first step in a two-part system to rebuild broken bonds and restore integrity. Ideal for all hair types, it enhances the absorption of the (second step sold separately) OLAPLEX No. 3 Hair Perfector for maximum results, leaving hair feeling softer, smoother, and healthier. Transform your hair's texture and resilience with this revolutionary treatment.