Olaplex No. 0 Intensive Bond Building Hair Treatment — 25% Off

Olaplex No. 0 is the highest-strength entry in the at-home Olaplex system, designed as a primer that maximizes the bond-rebuilding effect of No. 3 when the two are layered together. Sprayed on dry hair and left for 10 minutes before applying No. 3, the watery formula penetrates deep into the strand and primes the cuticle so that the follow-up treatment can repair more bonds than No. 3 alone can deliver. It’s particularly impactful for hair that has been bleached, heavily heat-styled, or chemically treated — the kind of damage where standard conditioners and masks no longer make a noticeable difference. With over 21,000 reviews and a 4.5-star average, it has earned a strong reputation among colorists and home users running the full No. 0 + No. 3 protocol. At $22.50 — 25% off the $30.00 list price — this is a meaningful discount on a salon-tier intensive treatment.