Head to head
Leave-In Molecular Repair Hair Mask vs Nº.3PLUS Complete Repair Treatment
Olaplex Nº.3PLUS Complete Repair Treatment edges out K18 Leave-In Molecular Repair Hair Mask, 7.9 to 7.8. It wins on texture and feel and value, while the Leave-In Molecular Repair Hair Mask is stronger on results and formula.
Benefit fingerprints
What each one does.
K18 Leave-In Molecular Repair Hair Mask
Olaplex Nº.3PLUS Complete Repair Treatment
Side by side
Every detail, compared.
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- Damage repair
- Split ends
- Smoothing
- Frizz control
- Damage repair
- Frizz control
- Hydrating
- • Bleached, highlighted or chemically processed hair
- • Heat-damaged hair that breaks easily
- • Anyone who wants a fast, no-rinse repair step
- • Bleached, colored or heat-damaged hair
- • Anyone who skipped the old Nº.3 because of its long wait
- • Protein-sensitive hair that still wants bond repair
- Quick routine: four minutes on towel-dried hair, no rinsing
- Patented K18PEPTIDE targets bleach, color, chemical and heat damage, per the brand
- Many bleached and chemically treated hair reviewers report noticeably stronger, softer hair
- Works in 3 minutes before shampooing
- Protein-free and color-safe, per the brand
- Built on Olaplex's patented bond-building ingredient
- $75 for 50 ml is expensive
- Must go on unconditioned hair, which changes most wash-day routines
- Pricier than drugstore bond-repair pre-shampoos
- An extra rinse-off step on wash day, unlike leave-in repair masks
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Affiliate links — we may earn a commission. How we make money
FAQ
Quick answers.
Which is better, Leave-In Molecular Repair Hair Mask or Nº.3PLUS Complete Repair Treatment?
Olaplex Nº.3PLUS Complete Repair Treatment edges out K18 Leave-In Molecular Repair Hair Mask, 7.9 to 7.8. It wins on texture and feel and value, while the Leave-In Molecular Repair Hair Mask is stronger on results and formula.
Which is better value?
K18 Leave-In Molecular Repair Hair Mask works out to about $44.36 / oz and Olaplex Nº.3PLUS Complete Repair Treatment to about $10.05 / oz, based on typical non-Amazon retail prices when we last checked.
How do you score them?
Both are scored on the same five-factor rubric (results, formula & ingredients, texture & experience, value, community love), using the formula or specs, verified creator reviews, community consensus and value. Brands can’t pay for placement.