Olaplex N°.5 Bond Maintenance™ Hair Strengthening Conditioner: Repairs Damage & Defend Against Future Breakage | Reduce Frizz |…
Best for
Best for damaged hair (Olaplex / K18)
Amazon rating
Amazon aggregate, one input among many in the Verdict Score
Current price
$23.80
Updated Jun 27, 2026 · 1 min read
The consensus
What reviewers found
Synthesized across the trust-weighted source mix below.
Olaplex No. 5 carries by far the largest review base in this roundup, roughly 80,000 verified-purchase ratings at a 4.6 average, which is a strong consensus signal even before considering its reputation. Buyers overwhelmingly use it as a bond-maintenance conditioner for chemically treated, colored, or heat-damaged hair, and the rating volume suggests durable satisfaction within that audience.
What reviewers liked
- Largest verified-purchase base in the pool (~80,000) at a 4.6 average
- Positioned for color-treated, bleached, and heat-damaged hair, where buyer reviews skew most positive
- Works across coily, curly, wavy, and straight textures per the listing
Where it falls short
- No independent lab or expert testing was supplied to verify the bond-repair claims
- Premium price (~$24) hard to justify for healthy, undamaged hair
- Subjective verdicts on bond products vary; data here can't surface that disagreement
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Olaplex No. 5 carries by far the largest review base in this roundup, roughly 80,000 verified-purchase ratings at a 4.6 average, which is a strong consensus signal even before considering its reputation. Buyers overwhelmingly use it as a bond-maintenance conditioner for chemically treated, colored, or heat-damaged hair, and the rating volume suggests durable satisfaction within that audience.
We should flag clearly that the supplied data contained no independent lab results, expert reviews, or specialist-community threads for this product, despite Olaplex being a heavily discussed brand elsewhere. So the high placement here reflects retailer-rating consensus, not verified bond-repair chemistry we can cite. It lands the damaged-hair slot on that buyer sentiment. People with healthy, undamaged hair may find it offers little over a cheaper moisturizing conditioner, and at around $24 it is a premium spend.
- KEY BENEFITS ✓ Repairs everyday damage and defends against future breakage ✓ Strengthens and reinforces bonds for more resilient hair ✓ Replenishes hydration and enhances softness ✓ Dramatically improves detangling and manageability ✓ Clinically proven to boost shine and reduce frizz ✓ Dermatologist Tested. Vegan. Color-Safe and suitable for chemically treated hair.
- Clinically Proven ● 2X more volumized hair, instantly & all day ● Repairs everyday damage in 1 wash ● 2X stronger hair at a molecular level ● 60% less Breakage to protect hair length and fullness [body] ● 90% more weightless hydration ● 90% easier Detangling ● Soft, smooth, and more manageable hair in 1 wash *When used as a system with Nº.4FINE Bond Maintenance Shampoo
- INGREDIENTS Panthenol and Glycerin Draws moisture to hair to keep it hydrated and helps prevent breakage.
- A little goes a long way with this highly concentrated formula. 100mL: Up to 25 applications* 250mL: Up to 50 applications* 1000mL: Up to 100 applications* *Based on average application size of 5mL After shampooing with Nº.4 Bond Maintenance Shampoo: Dispense and apply to mid-lengths and ends. Leave on for 1-3 minutes. Rinse well.
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