Our Take
A pre-shampoo priming treatment applied to dry hair before No.3 Hair Perfector. It prepares hair to absorb the subsequent treatment more effectively, extending its repair benefits. Applied from roots to ends, left for 10 minutes, then topped with No.3 before rinsing both together. The most impactful way to use Olaplex at home — but the two-step commitment does add time to wash day. Best for colour-treated, bleached, or significantly damaged curls.
Who is this for?
Our assessment — not the brand's claim
Curl Pattern
Porosity
Free From
Ingredients at a Glance
Water
Universal solvent and primary base of most hair products.
Olaplex Bond Building Active
Sodium Benzoate
Food-grade preservative.
Phenoxyethanol
Widely used preservative, considered safe.
Free From
Want to know more about an ingredient? Browse the ingredient glossary →
How to Use
Apply to dry hair from root to tip. Leave for 10 minutes. Without rinsing, apply No.3 Hair Perfector on top. Leave for a further 10 minutes, then rinse thoroughly and shampoo as normal.
Save to List
Where to Buy
Links may earn us a small commission at no extra cost to you.
Olaplex
Brand Website
Details
- Type
- Hair Masque
- Line
- Bond Building
- Price tier
- premium
- Routine step
- Treat
Reviews
Loading reviews…
More from the Bond Building Range
Nº.4C Bond Maintenance® Clarifying Shampoo
Deep-cleansing clarifying shampoo — use occasionally, not daily
Cleanser
Rich Hydration Mask
Intensive bond-building mask for medium to thick or dry curls
Treatment
N°.4Fine Bond Maintenance® Shampoo
Bond maintenance shampoo specifically formulated for fine hair
Cleanser
Nº.3 Hair Perfector®
The original at-home bond repair treatment — Olaplex's bestseller
Treatment
Nº.4 Bond Maintenance® Shampoo
Daily sulphate-free shampoo with bond-building technology
Cleanser
N°.5Fine Bond Maintenance® Conditioner
Lightweight rinse-out conditioner for fine curls and waves
Conditioner