Premium BeautyEst. 2026
Eclat Press

The Premium Beauty Edit

Focused Guide · Technology explainer: the major bond systems as published, compared without adopting any brand's promise

Bond Repair Explained: What Bond Builders Claim and How the Technologies Differ

The five published bond technologies in one place: Olaplex's patented active, K18's peptide, Redken's citric acid complex, Kerastase's decalcifying pair and Epres's acid free concentrate, each described in its brand's own terms.

Bond Repair Explained: What Bond Builders Claim and How the Technologies Differ - the Eclat Press editorial plate
Bond Repair Explained: What Bond Builders Claim and How the Technologies DifferFocused Guide
No. 1

The Selection

4 listings that answer this brief.

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
No. 1

Olaplex No.3 Hair Perfector

The Maleate System

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

Olaplex publishes one patented active, Bis-Aminopropyl Diglycol Dimaleate, across its whole line, and describes it as relinking broken disulfide bonds, in the brand's words. One molecule, one story, applied to every format the line sells.

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.
K18 Leave-In Molecular Repair Hair Mask white 50 ml pump bottle beside its red and white carton reading K18PEPTIDE biotech
No. 2

K18 Leave-In Molecular Repair Hair Mask

The Peptide System

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 publishes a biomimetic peptide, printed as sh-Oligopeptide-78, described by the brand as fitting the hair's own polypeptide chains. Its framing is molecular rather than bond named, and its format, a four minute leave in, follows from that story.

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.
Redken Acidic Bonding Concentrate Intensive Treatment white 5.1 fl oz bottle, label reading citric acid plus 14 percent bonding care complex
No. 3

Redken Acidic Bonding Concentrate Intensive Treatment

The Acid Complex System

The salon acid system at full strength: a pre-shampoo rinse out treatment with citric acid and a 14 percent bonding care complex, as printed on the bottle.

Redken publishes citric acid plus a bonding care complex at printed percentages, 14 percent in this intensive bottle. The claim structure is concentration and pH: an acidic system for processed hair, with the numbers on the label instead of a patented name.

Suits

Demanding, processed hair, the regimen the bottle itself prints, especially colour treated hair whose owner prefers a salon system with printed percentages over a patented active story.

Skip if

You dislike multi step wash days or already own the matching Redken shampoo and conditioner and want the daily piece instead: that is the Leave-In Treatment, a different product also in this edit.

Size
150 ml / 5.1 fl oz
Format
Pre-shampoo rinse out treatment, bottle
Key Ingredients
Citric acid plus 14 percent Bonding Care Complex, as printed on the bottle
Use
Apply to damp hair before shampooing, leave 5 to 10 minutes, rinse, then shampoo and condition, as directed on the listing
Hair Type
Demanding, processed and colour treated hair, as printed on the bottle
View on AmazonPremium listing verified: Redken brand content on the Amazon.com listing from L'Oreal USA S/D, INC. Professional Products (Redken), with From the manufacturer material and manufacturer Redken as printed; Redken is a salon professional brand sold through Amazon Premium Beauty channels.
Kerastase Premiere Concentre Decalcifiant Ultra-Reparateur silver 250 ml pump bottle with red K logo, label reading 8 percent citric acid plus glycine
No. 4

Kérastase Première Concentré Décalcifiant Ultra-Réparateur

The Decalcifying System

The decalcifying pre-shampoo: citric acid and glycine aimed first at the calcium build up hard water leaves in damaged hair, in the brand's dual action framing.

Premiere publishes a two part diagnosis: citric acid removes calcium build up that the brand says overloads porous damaged hair, and glycine addresses the links between keratin chains. It is the only system here that blames the water as well as the bleach.

Suits

Damaged hair that has turned stiff, rigid and dull, especially in hard water areas: the brand's published premise is that porous, damaged hair absorbs excess calcium, and this concentrate is built to remove it before repairing.

Skip if

Your water is soft and your hair's problem is plain bleach fragility. The decalcifying half of this formula solves a problem you may not have, and the Olaplex or K18 entries aim more directly at yours.

Size
250 ml / 8.45 fl oz
Format
Pre-shampoo decalcifying treatment, pump bottle
Key Ingredients
Citric acid and glycine, 8 percent blend as printed on the bottle
Use
Apply generously to damp hair before shampooing, massage, leave 5 minutes, do not rinse, layer shampoo directly over, then rinse, as directed by the brand
Hair Type
All types of damaged hair, as printed on the bottle
View on AmazonPremium listing verified: Kerastase brand listing on Amazon.com for the Premiere Repair Pre-Shampoo Treatment, with brand Kerastase and liquid volume 8.5 fl oz as printed; Kerastase is the L'Oreal professional brand sold through Amazon Premium Beauty, and the same product is documented on the Kerastase USA manufacturer site.
No. 2

Questions, Answered

Are disulfide bonds the only bonds that matter in hair?

They are the strongest of the bond types brands talk about, and the ones bleach and chemical services stress most in the published literature of these brands. Hydrogen and salt bonds also shape how hair behaves, and they shift with water and pH, which is part of why acid based and peptide systems frame their stories differently. Curlsmith publishes its salve against three bond types. The honest takeaway is that bond is an umbrella word in this category, and each brand defines its corner of it.

Why do the brands' claims sound stronger than this page's language?

Because brand copy is marketing for a technology, and this site's copy is a buying guide. Where a brand writes repair, this page writes the cosmetic outcome a buyer can actually verify: the look and feel of stronger, smoother, less fragile hair. Keeping the two apart is deliberate, and it is how the products here should be judged after purchase as well.

Widen the lens in the full Best Bond Repair Treatments 2027 ranking, or return to the Bond Repair and Hair Treatments hub.

No. ·

Keep Researching

Every page in the Bond Repair and Hair Treatments edit.

  1. 01Bond Repair and Hair Treatments: the hubHub
  2. 02Best Bond Repair Treatments 2027Best of
  3. 03How Often to Use Bond Treatments, and How to Layer Them with Protein and MoistureGuide
  4. 04Bond Repair for Bleached and Heat Styled Hair: Routines by Damage PatternGuide
  5. 05Olaplex No.3 Hair Perfector ReviewReview
  6. 06Olaplex No.0 Intensive Bond Building Hair Treatment ReviewReview
  7. 07Redken Acidic Bonding Concentrate Intensive Treatment ReviewReview
  8. 08Olaplex No.3 vs K18 Leave-In Molecular Repair MaskComparison
  9. 09Redken Acidic Bonding Concentrate Intensive Treatment vs Olaplex No.3Comparison
  10. 10Bond Repair Treatments Buying GuideBuying guide
  11. 11Bond Treatment Care and Keeping: Fixing Stiff, Dry and Underwhelming ResultsCare
No. ·

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