Premium Hair · The Edit

Bond Repair and Hair Treatments

Bond repair treatments sorted by technology, format and the damage pattern they actually suit

Bond repair is the one haircare category where the technology name on the bottle is the product. Olaplex organises its whole line around a single patented active. K18 publishes a patented peptide. Redken builds on citric acid at printed percentages. Kerastase Premiere pairs citric acid with glycine and aims it first at calcium build up from hard water. Epres prints an acid free, four ingredient concentrate with its own named diffusion technology. Those are five different published answers to the same complaint, hair that looks and feels fragile after bleach, colour, chemical services and heat, and this edit judges them side by side as one category instead of letting each brand grade its own homework.

Every product here was checked on its live Amazon listing through an official brand channel, and the claims are handled the way this site handles all of them: the technology language is quoted as the brands publish it, while the results are described in cosmetic terms, hair that looks smoother and shinier and feels stronger and less fragile in the hand. Nothing here is promised to fix a split end for good, because no cosmetic does. Three products are carried over from the pilot hair topics with their verified records intact, and one candidate, the Pureology Miracle Filler spray, was left out because its current ASIN could not be confirmed and its formula is a filler lotion rather than a bond system. That gap is stated here rather than papered over.

Read the best-of guide How to choose

Olaplex No.3 Hair Perfector white 100 ml bottle with flip cap in front of a cream texture smear, label reading The Original Hair Perfector — Olaplex No.3 Hair Perfector: the leading pickThe Bond Repair and Hair Treatments Edit

No. 1

The Leading Three

The top of the ranked guide, in brief. The full ranking sits in the best-of.

No. 1

Olaplex No.3 Hair Perfector

Best Overall

The original: the pre-shampoo perfector that started the bond category, built on the brand's patented Bond Building Technology as published.

The reference product of the category still earns the top place: one patented active as published, a ten minute weekly pre-shampoo protocol, and the deepest owner record of any bond product sold. For a first bond purchase on damaged looking hair, this is the bottle the rivals are all answering.

Suits

Damaged looking hair of any type that needs one proven weekly treatment step: bleached, coloured or heat styled hair that feels fragile and breaks easily in brushing.

Skip if

Your hair is healthy, unprocessed and only dry. No.3 is a treatment, not a conditioner or a moisture mask, and the brand says so on its own listing; dry hair without damage is better served by the No.8 mask in this edit.

Size: 100 ml / 3.3 fl oz
Format: Pre-shampoo cream treatment, bottle
Key Ingredients: Bis-Aminopropyl Diglycol Dimaleate (the brand's Bond Building Technology, as published), panthenol, jojoba seed oil, sweet almond oil
Use: Apply generously to damp hair before shampooing, leave 10 minutes, rinse, then shampoo and condition, once weekly or up to 2 to 3 times weekly for very damaged hair, as directed by the brand
Hair Type: All hair types, as printed on the bottle

View on AmazonPremium listing verified: Official Olaplex brand content on the Amazon.com listing (From Olaplex), with manufacturer Olaplex and UPC 896364002350 as printed in the product details; Olaplex sells through Amazon Premium Beauty.

No. 2

K18 Leave-In Molecular Repair Hair Mask

Best Leave In Treatment

The peptide exception in a bond edit: a leave in treatment the brand publishes under molecular repair naming, used instead of conditioner and never rinsed.

K18 refuses the category's usual shape: no rinse, no conditioner, four minutes, a patented peptide as its published system. It ranks second only because its brief is damage without dryness; for processed hair that hates long routines, it is effectively first.

Suits

Bleached, coloured, chemically serviced or heat styled hair that looks and feels damaged, for owners who want the treatment step finished in four minutes with no rinse and no conditioner.

Skip if

Your main complaint is dryness rather than damage, or you want a rich mask ritual. This is a light cream dosed in single pumps, and the moisture brief belongs to the No.8 or Amika entries here.

Size: 50 ml / 1.7 fl oz
Format: Leave in cream, pump bottle
Key Ingredients: K18PEPTIDE (sh-Oligopeptide-78), hydrolyzed wheat protein, tocopherol
Use: After shampoo only, towel dry, 1 to 3 pumps, wait 4 minutes, do not rinse, as directed on the listing
Hair Type: All hair types, as printed on the listing

View on AmazonPremium listing verified: Sold by K18 Hair and shipped from Amazon on the listing, with a Premium Brand Sourced badge and Visit the K18 Store context as printed; manufacturer K18, item model K18-31005.

No. 3

Olaplex No.0 Intensive Bond Building Hair Treatment

Best Primer for Heavily Processed Hair

The primer: a spray on first step the brand directs underneath No.3, for hair that needs the deepest version of the Olaplex routine.

A four ingredient spray primer built to be layered under No.3, for the hair in this edit that is furthest gone in look and feel. It cannot rank higher because it is half a routine by design, but as that half it has no substitute here.

Suits

Heavily bleached, repeatedly coloured or otherwise seriously compromised hair, used as the brand directs: as the priming half of a two step routine with No.3 layered over it.

Skip if

You want one product, one step. No.0 is published as a primer for No.3 and is not positioned as a standalone treatment; on its own it is the wrong purchase, and No.3 alone covers milder damage.

Size: 155 ml / 5.2 fl oz
Format: Pre-shampoo primer spray, trigger bottle
Key Ingredients: Bis-Aminopropyl Diglycol Dimaleate (the brand's Bond Building Technology, as published); four ingredient formula as printed on the packaging
Use: Spray onto dry hair until damp, leave 10 minutes, layer No.3 over without rinsing, leave 10 more minutes, rinse, shampoo and condition, as directed by the brand
Hair Type: All hair types, as printed on the bottle

View on AmazonPremium listing verified: Official Olaplex brand content on the Amazon.com listing (From Olaplex), sold and shipped by Amazon.com as printed, with manufacturer Olaplex, manufacturer part number 20142879 and UPC 850018802208 in the product details.

See all 12 picks in the Best Bond Repair Treatments 2027 guide

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Keep Researching

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