OLAPLEX Nº.7 Bonding Oil

OLAPLEX recommends 2–3 drops as a starting point for medium-length, medium-thickness hair. Use 1–2 drops for fine or short hair; 3–4 drops for thick, coarse, or very long hair. The key is to warm the drops between your palms before distributing through mid-lengths and ends — the product is highly concentrated, and spreading it evenly is more important than volume.

You can technically over-apply, and when you do the hair looks greasy, flat, or weighted down. The metered-drop dispenser (tapping the base of the upside-down bottle) is specifically designed to prevent this — each tap releases one controlled drop. The safest approach is always to start with fewer drops than you think you need, assess the result, and add more in future applications if needed. A common mistake is dispensing from a right-side-up bottle and getting a large pour; always invert and tap.

The bond-repair chemistry (Bis-Aminopropyl Diglycol Dimaleate) does not build up — it bonds into hair structure and doesn't sit on the surface. However, the silicones (Dimethicone, Phenyl Trimethicone) that deliver frizz control and shine can accumulate with daily use, particularly if you also use other silicone-containing products like serums, leave-in conditioners, or dry shampoos.

OLAPLEX recommends using their Nº.4C Bond Maintenance Clarifying Shampoo once a month as a silicone reset — it removes buildup without stripping colour or hair structure. Alternatively, OUAI Detox Shampoo's chelating agents also effectively remove silicone buildup. Most users find monthly clarification keeps the oil performing at its best; you'll notice a return to full shine and bounce after each clarifying wash.

Both — and this is one of the product's most practical advantages. On damp/wet hair before blow-drying: apply 2–3 drops after towel-drying, distribute through mid-lengths and ends, then style as normal. This is the recommended method for maximum bond repair and heat protection, as the molecule has more time to work while the hair dries.

On dry hair for restyling: 1–2 drops smoothed over the surface adds shine, tames flyaways, and can refresh a second-day style without washing. This is also when many users mix a drop or two into OLAPLEX Nº.6 Bond Smoother for exceptional shine and hold — a pairing we validated in testing as genuinely superior to either product used alone. You can also reapply to dry sections immediately before flat-ironing or curling for heat protection on specific areas.

Buy OLAPLEX Nº.7 if: your hair has any level of damage from bleaching, chemical processing, heat styling, or even mechanical damage from brushing — or if you want genuine bond-repair chemistry alongside your shine and frizz-control benefits. Also buy it if you need legitimate 450°F heat protection before styling. The higher concentration means a $30 bottle typically outlasts Moroccanoil despite the similar price.

Buy Moroccanoil Treatment if: your hair is in good condition and you simply want a surface conditioning and shine product, or if you prefer the Moroccanoil amber-argan fragrance specifically. Moroccanoil does not provide heat protection at high temperatures and does not contain bond-repair chemistry, but it is an excellent surface conditioner and widely trusted. For hair that is damaged, bleached, or in active need of structural repair, we recommend OLAPLEX Nº.7 without hesitation — see our comparison table above for the full head-to-head. Try OLAPLEX Nº.7 from Sephora with their free returns policy if you want to test it risk-free.