No. 4C Bond Maintenance Clarifying Shampoo
No. 4C Bond Maintenance Clarifying Shampoo
Product Description
Product overview
A sulfate-free clarifying shampoo powered by Olaplex's patented Bond Building Technology that deeply removes product buildup, hard water minerals, chlorine, heavy metals, and pollutants without stripping moisture or color. Use weekly for a total hair reset.
Patented Bond Building Technology
Bis-Aminopropyl Diglycol Dimaleate repairs broken disulfide bonds at the molecular level while you cleanse, strengthening hair from within.
Texture & feel
SENSORYPatented Bond Building Technology
Bis-Aminopropyl Diglycol Dimaleate repairs broken disulfide bonds at the molecular level while you cleanse, strengthening hair from within.
Broad-Spectrum Clarifying System
Removes product buildup, hard water minerals, chlorine, heavy metals, and environmental pollutants without harsh sulfates.
Color Safe Formula
Sulfate-free and pH balanced to maintain hydration and protect permanent hair color from fading during deep cleansing.
Gentle Deep Cleanse
Unlike traditional clarifying shampoos, this formula uses mild coconut-derived surfactants so hair doesn't feel stripped, dry, or straw-like.
Safety & compatibility
SAFEContains fragrance allergens (Citral, Hexyl Cinnamal, Limonene). No retinoids, salicylic acid, or known teratogens. The active ingredient Bis-Aminopropyl Diglycol Dimaleate has no known adverse effects during pregnancy, but consult your doctor due to the fragrance components.
Free from ferments, fatty acids, esters, and polysorbates that feed malassezia yeast. Safe for fungal acne-prone scalps.
Rated 0/5 on the comedogenic scale. As a rinse-off product with no heavy oils or waxes, it will not clog pores or hair follicles.
Safe for permanent hair color. Wait at least 2 weeks after coloring before use. Consult your stylist for semi-permanent or fashion colors.
Safe for keratin treatments, perms, and relaxers. The bond-building technology actually supports chemically treated hair.
Contains Citral, Hexyl Cinnamal, and Limonene (EU-regulated allergens). If you have a known fragrance sensitivity, patch test first.
Ingredient breakdown
INGREDIENTSBis-Aminopropyl Diglycol DimaleatePatented
Olaplex's patented bond-building molecule. It targets and repairs broken disulfide bonds within the hair shaft, restoring structural integrity, strength, and elasticity that are lost from heat, chemical processing, and environmental damage.
- Mechanism: Re-links broken disulfide bonds at the molecular level within the hair cortex
- Clinical evidence: Proven to reduce breakage and increase hair tensile strength
- Unique: The only patented bond-rebuilding ingredient — competitors use bond-protecting agents, not rebuilders
Sodium Lauroyl Methyl IsethionateGentle Surfactant
The primary cleansing agent. A coconut-derived, sulfate-free surfactant that provides effective cleansing without stripping natural oils. Known for being one of the mildest cleansing agents available in haircare.
- Type: Anionic surfactant derived from coconut oil
- Mildness: Significantly gentler than SLS/SLES — ideal for color-treated and damaged hair
- Lather: Produces a moderate, creamy foam
Panthenol (Pro-Vitamin B5)Proven
A well-established hair conditioning and moisturizing agent that penetrates the hair shaft to improve moisture retention, add shine, and reduce split ends. Also soothes the scalp.
- Function: Humectant that attracts and holds moisture in hair strands
- Benefit: Improves hair elasticity, reduces breakage, and adds natural shine
- Scalp care: Anti-inflammatory properties help soothe irritated scalps
Trisodium Ethylenediamine DisuccinateChelating Agent
A biodegradable chelating agent that binds to and removes heavy metal ions and hard water mineral deposits from hair. This is a key component of the Broad-Spectrum Clarifying System.
- Targets: Calcium, magnesium, copper, iron, and other mineral deposits from hard water
- Environmental: Fully biodegradable — an eco-friendly alternative to EDTA
- Result: Removes dulling mineral buildup to restore shine and color vibrancy
Amino Acid Complex 13 amino acidsConditioning
A blend of 13 amino acids including Arginine, Glycine, Serine, Proline, and Histidine that are naturally found in hair. These skin-identical ingredients help maintain the hair's natural moisture factor (NMF).
- Includes: Arginine, Aspartic Acid, PCA, Glycine, Alanine, Serine, Valine, Isoleucine, Proline, Threonine, Histidine, Phenylalanine, Sodium PCA
- Function: Replenishes the hair's Natural Moisturizing Factor for hydration and softness
- Benefit: Prevents the dry, straw-like feeling typical of clarifying shampoos
43 ingredients
Water (Aqua/Eau), Sodium Lauroyl Methyl Isethionate, Cocamidopropyl Hydroxysultaine, Sodium Lauroyl Glutamate, Coco-Betaine, Disodium Laureth Sulfosuccinate, Acrylates Copolymer, Cocamidopropyl Betaine, Cocamidopropylamine Oxide, Sodium Methyl Oleoyl Taurate, Decyl Glucoside, Bis-Aminopropyl Diglycol Dimaleate, Sodium Lauryl Sulfoacetate, Phenoxyethanol, Coco-Glucoside, Lauryl Glucoside, Chlorphenesin, Panthenol, Trisodium Ethylenediamine Disuccinate, Ethylhexylglycerin, Sodium Benzoate, Polyquaternium-11, Benzoic Acid, Sodium PCA, Pentasodium Triphosphate, Sodium Lactate, Arginine, Aspartic Acid, PCA, Citric Acid, Glycine, Alanine, Serine, Valine, Isoleucine, Proline, Threonine, Histidine, Phenylalanine, Fragrance (Parfum), Citral, Hexyl Cinnamal, Limonene.
Where it fits in your routine
ROUTINEUse No.4C once weekly in place of your regular shampoo. For a complete damage reversal routine, start with No.3 Hair Perfector as a pre-shampoo treatment, then follow No.4C with No.5 Conditioner or No.8 Moisture Mask.
How to use
HOW TO USEWet Hair Thoroughly
Saturate hair completely with warm water. This helps the shampoo distribute evenly and lather properly.
Apply & Concentrate on Scalp
Dispense a quarter-sized amount into palms. Apply directly to the scalp and work through to the ends. A little goes a long way.
Lather & Let Process
Lather fully and leave on for up to 5 minutes. This allows the chelating and clarifying agents to dissolve mineral deposits and buildup.
Rinse Thoroughly
Rinse completely with lukewarm water. Follow with No.5 Conditioner, No.8 Moisture Mask, or your preferred conditioner for optimal results.
Who is it for?
WHOPerfect for you if:
- You experience product buildup from styling products, dry shampoo, or heavy conditioners
- You live in a hard water area and notice dull, discolored hair
- You swim regularly and need to remove chlorine deposits
- Your hair feels heavy, limp, or weighed down between washes
- You have color-treated hair and need a color-safe clarifier
- You want a gentler alternative to harsh sulfate-based clarifying shampoos
Consider alternatives if:
- You have extremely dry or coarse hair that needs maximum moisture (may need extra conditioning after)
- You're on a tight budget — at $32 for 8.5 oz, it's a premium product
- You want a daily-use shampoo (this is designed for weekly use only)
- You're highly sensitive to any fragrance (contains fragrance allergens)
- You just colored your hair in the last 2 weeks
Hair type compatibility
SKIN TYPESOutstanding at removing excess sebum and buildup. Provides a deep, fresh clean that helps extend time between washes.
Removes buildup that weighs fine hair down. Restores airy volume and bounce without over-stripping.
Sulfate-free formula preserves color while removing dulling deposits. Restores vibrant color clarity after buildup removal.
Effectively removes product buildup from curl creams and gels. Follow with a deep conditioner as curls may need extra moisture afterward.
The bond-building technology helps, but very dry hair may feel stripped. Always follow with a rich conditioner or hair mask. Use every 2 weeks instead of weekly.
Perfect weekly reset to maintain healthy, shiny hair and prevent gradual buildup from daily products and environmental exposure.
Results timeline
3+ MONTHSImmediate Clarity & Shine
Hair feels noticeably lighter, cleaner, and shinier after just one wash. Mineral buildup and product residue visibly removed. Many users describe an instant "reset" feeling.
85% noticed immediate improvementImproved Volume & Color Vibrancy
With consistent weekly use, hair gains more body, volume, and bounce. Color-treated hair looks more vibrant as dulling deposits are consistently cleared away.
78% reported improved volumeStronger, Healthier Hair
The cumulative effect of bond building technology becomes more apparent. Less breakage, improved elasticity, and a healthier overall appearance. Other haircare products absorb and work better on clean hair.
72% noticed reduced breakageLong-Term Hair Health
Ongoing use maintains optimal scalp and hair health. Users report being able to extend time between washes and that their overall hair routine works significantly better.
80% continued regular useRatings by platform
18K+ REVIEWSPros & cons
BALANCEDPraised
- Deeply clarifies without stripping moisture like sulfate shampoos
- Patented bond-building technology repairs while cleansing
- Safe for color-treated and chemically processed hair
- Removes hard water mineral deposits effectively
- A little product goes a long way — only need a small amount
- Noticeable improvement in shine, volume, and softness after first use
- Pleasant, subtle Olaplex signature scent
- Allure Best of Beauty award winner
Criticized
- Premium price at $32 for 8.5 oz
- Can feel drying on very dry or curly hair without conditioner
- Lower lather than traditional clarifying shampoos (no sulfates)
- Some users report scalp greasiness the day after washing
- Contains fragrance — not suitable for fragrance-sensitive individuals
- Weekly-use-only product, so you still need a daily shampoo
- Results may be subtle if you don't have significant buildup
Budget-friendly alternatives (dupes)
DUPESA very affordable clarifying shampoo that removes buildup effectively. However, it contains sulfates, is not color-safe, has no bond-building technology, and can be quite drying. Best for those on a tight budget who don't color their hair.
Color-safe clarifying shampoo enriched with argan oil, keratin, and botanical extracts. Great at removing buildup and very gentle, but lacks Olaplex's patented bond-building technology. Slightly more moisturizing for dry hair types.
A salon-grade clarifying shampoo that's excellent at removing chlorine and mineral deposits. Contains sulfates and has a higher pH, so it's more stripping than Olaplex. No bond repair technology. Good value for swimmers.
Comparison with competitors
SIDE-BY-SIDEOlaplex No.4C
Amika The Kure Bond Repair Shampoo
Storage & shelf life
12 MONTHS12 months after opening
Store in a cool, dry place away from direct sunlight. Keep bottle sealed when not in use. Bathroom storage is fine.
Opaque plastic squeeze bottle with flip-top cap. Compact by Design certified for efficient shipping.
Yes, the 8.5 oz bottle exceeds the 3.4 oz TSA limit for carry-on, but a travel-size option is available. Also available in a 33.8 oz liter size for home use.
Frequently asked questions
FAQUse with caution. Olaplex No. 4C does not contain retinoids, salicylic acid, hydroquinone, or chemical sunscreens — the most commonly flagged ingredients for pregnancy. The active ingredient Bis-Aminopropyl Diglycol Dimaleate has no known adverse effects during pregnancy. However, the formula does contain fragrance allergens (Citral, Hexyl Cinnamal, Limonene), which some healthcare providers recommend avoiding. Consult your OB-GYN or dermatologist before use during pregnancy or breastfeeding.
Yes. Olaplex No. 4C does not contain ferments, fatty acids (like oleic acid), fatty acid esters, polysorbates, or other ingredients known to feed malassezia yeast. The formula uses gentle coconut-derived surfactants that are considered safe for fungal acne-prone scalps. It can actually help by removing the buildup that may contribute to scalp issues.
Yes. Since Olaplex No. 4C is a rinse-off hair product (not a skincare product), it does not interact with topical skincare actives like retinol, vitamin C, AHAs, or BHAs applied to the face. You can safely use it alongside any skincare routine. The formula does contain Citric Acid (an AHA), but at a low concentration intended for pH balancing, not exfoliation.
Olaplex No. 4C is designed for all hair types — straight, wavy, curly, and coily. It's especially beneficial for oily scalps, fine hair that gets weighed down by buildup, color-treated hair needing a gentle clarifier, and anyone living in a hard water area. Those with very dry or coarse hair should always follow with a rich conditioner or mask.
Most users notice an immediate difference after the very first wash — hair feels lighter, shinier, and cleaner. Volume and color vibrancy typically improve within 2-4 weeks of regular weekly use. The bond-building benefits accumulate over time, with noticeable improvements in hair strength and reduced breakage after 1-2 months of consistent use.
Use No. 4C once a week in place of your regular shampoo. For the best results, Olaplex recommends: (1) apply No. 3 Hair Perfector as a pre-shampoo treatment, (2) wash with No. 4C, (3) condition with No. 5 Conditioner or No. 8 Moisture Mask. On other wash days, use your regular shampoo or Olaplex No. 4.
No. Olaplex No. 4C has a comedogenic rating of 0/5. It's a rinse-off product that contains no heavy oils, waxes, or comedogenic ingredients. It's actually designed to remove buildup, so it helps keep hair follicles and pores clear rather than clogging them. It won't cause scalp acne or breakouts along the hairline.
Olaplex No. 4C has a Period After Opening (PAO) of 12 months. Since it's recommended for once-weekly use and only a small amount is needed per wash, the 8.5 oz (250ml) bottle typically lasts 3-4 months for most users. The liter size (33.8 oz) is available for better long-term value.
Verdict: Olaplex No. 4C Bond Maintenance Clarifying Shampoo is one of the best clarifying shampoos on the market for anyone who wants a deep clean without the harsh, stripping effects of traditional sulfate clarifiers. The patented bond-building technology sets it apart from every competitor, actively repairing hair while cleansing — something no other clarifying shampoo offers. It's especially outstanding for color-treated, fine, and oily hair types. The main drawback is the premium price point, and those with very dry or curly hair should always pair it with a deep conditioner. If buildup, hard water, or dull hair are your concerns, this is a proven, award-winning solution worth the investment.
Product Overview
Quick product notes are a great way to check if a product is free from commonly avoided ingredients by skincare enthusiasts. These preferences come about for different reasons depending on the ingredient such as personal experiences, sensitivities, health preferences & etc.
Just because a product is not free from a common preference does not mean it's a bad product! You can make a personal decision whether or not you want to use a product that contains these ingredients or not - click the labels of the preference to read more about them.
Quick Product Notes
Ever used a product that promised a certain effect but provided no results? It might not have contained any notable ingredients that could have been responsible for that promised effect. It doesn't matter what the marketing or packaging «promises» it can do, if it doesn't contain anything that can help - then the likelihood of it helping is low.
We help you identify key notable ingredients that have been shown to help with effects such as acne-fighting, brightening, UV-protection, wound healing & anti-aging to help you achieve your skincare goals smarter. Please note that different notable ingredients have varying levels of research behind them, some are extremely well proven yet some have mixed research in their efficacy.
Just because a product doesn't contain any notable ingredients doesn't mean it's bad. And a product with notable ingredients (or even many) doesn't necessarily guarantee the efficacy of the product performing these effects either. There are other factors such as ingredient quality, concentration and formulation that will ultimately determine this.
Be smart and use this as just a starting point for you to make more informed and smarter choices and compare it with reviews to see if the product is right for you
Notable Effects & Ingredients
Why are some products great for some people and horrible for others? Well everyone has different skin types and different reactions to the same ingredients.
We've identified a range of ingredients that are commonly regarded as potentially good or bad for those with Dry, Oily/Acne-Prone or Sensitive skin.
A product that contains good or bad ingredients for your skin type doesn't always flat out make the entire product good or bad for your skin. There are other factors such as ingredient quality, concentration and formulation that will ultimately determine your skins reaction.
One of the best ways to use this section is to troubleshoot products you've had bad experiences with in the past. Check if it contains any of the marked ingredients to point out suspect ingredients to avoid in the future!
Ingredients Related to Skin Types
Ingredient Safety Breakdown refers to the percentage % of ingredients in different risk categories as classified by EWG (Environment Working Group) if they are available. There are almost endless cosmetic ingredients and they are one of the few organisations globally that have assigned ratings to a lot of the more commonly used ingredients which is why we reference them.
EWG is seen by many to be more on the alarmist side in their assignment of health ratings resulting in rating ingredients as riskier than they actually are. We recommend using this a reference point rather than a strict guide of ingredient safety and to always do further research if into ingredients that you may find suspect.
Ingredient Safety Breakdown
Product ingredient list
| EWG | CIR | Ingredient Name & Cosmetic Functions | Notes |
|---|---|---|---|
| 1 |
Water
Solvent, Skin Conditioning
|
|
|
| 1 |
Sodium Lauroyl Methyl Isethionate
Cleansing, Surfactant
|
|
|
| 1 |
Cocamidopropyl Hydroxysultaine
Skin Conditioning, Viscosity Controlling, Viscosity Increasing Agent, Antistatic Agent, Hair Conditioning, Sufactant, Foam Boosting
|
|
|
| 1 |
Sodium Lauroyl Glutamate
Surfactant, Antistatic Agent, Hair Conditioning
|
|
|
| 1 |
Coco-Betaine
Skin Conditioning, Viscosity Controlling, Viscosity Increasing Agent, Antistatic Agent, Hair Conditioning, Sufactant, Foam Boosting
|
|



