The Liquid Keratin Deep De-Frizz Conditioner 33oz is a professional-grade hair care formula built around one straightforward idea: put keratin back into hair that has lost it. Keratin is the protein your hair is naturally made of, and daily heat, chemical treatments, and environmental stress gradually strip it away. This de-frizz treatment works as a maintenance conditioner — meaning you use it regularly to keep hair smooth and strong, not as a one-time fix. The 33oz bottle is roughly equivalent to three standard conditioner bottles, making it a genuinely practical choice for anyone who conditions frequently or wants a long-lasting supply.

Features & Benefits

The keratin protein in this keratin conditioner doesn't just coat the surface — it works its way into the hair shaft to reinforce structure, reduce breakage, and leave strands noticeably smoother. You'll likely notice less frizz right after the first rinse, and with consistent use, that improvement tends to hold up even in humid conditions. There's also built-in UV protection, which is easy to overlook but genuinely useful if you spend time outdoors. The formula is free of parabens and sodium chloride, which matters a lot for anyone with color-treated or chemically processed hair — both of those additives can strip pigment and weaken treatment results.

Best For

This de-frizz treatment is an especially strong match for anyone dealing with chronically frizzy or coarse hair that swells up in heat or humidity. It's also a go-to aftercare option if you've had a professional keratin straightening treatment, relaxer, or color service — the sodium chloride-free formula won't interfere with those results the way many standard conditioners can. The large bottle size makes sense for households where more than one person uses it, or for anyone who deep conditions weekly. People with fine or already-smooth hair may find it heavier than they need, so it's worth considering your hair's natural texture before committing to the full size.

User Feedback

Most people who stick with the Liquid Keratin conditioner report that it delivers on its core promise — frizz visibly calms down, and hair feels softer after just a few uses. The smoothing effect tends to last well between washes, which reviewers appreciate. On the downside, some users find the scent a bit strong and not universally loved. A handful of people with finer hair mention that using too much can leave strands feeling weighed down, so application amount seems to matter. A few buyers have also noted that while it improves hair manageability considerably, it shouldn't be confused with an in-salon keratin straightening service — the results, though noticeable, are more subtle.

#Deep Conditioners

#Shampoo & Conditioner

#Hair Care

#Beauty & Personal Care

Pros

Frizz visibly reduces after just a few uses, even in humid weather.
The sodium chloride-free formula makes it safe for color-treated and chemically processed hair.
Keratin protein builds up gradually, strengthening hair and reducing breakage over time.
The 33oz size offers genuinely long-lasting value for frequent conditioners.
Built-in UV protection adds a layer of defense that most conditioners skip entirely.
Paraben-free formula appeals to those avoiding harsher synthetic preservatives.
Works across a wide range of hair textures, from wavy to coarse and curly.
The smoothing effect tends to carry over between washes, not just on wash day.
Compatible with professional keratin aftercare routines without disrupting treatment results.

Cons

This keratin conditioner is not a substitute for a salon keratin straightening treatment — results are subtler.
The scent is noticeable and not universally liked; fragrance-sensitive users may find it off-putting.
Fine or low-porosity hair can easily become weighed down if too much product is applied.
The 33oz commitment is a lot if you're trying the formula for the first time and aren't sure it suits your hair.
Results vary considerably depending on hair porosity — some users see dramatic smoothing, others notice modest improvement.
No travel-size or trial option appears to be available, making it harder to test before investing.
The price point sits higher than mass-market conditioners, which may be hard to justify for casual or infrequent users.
Application amount requires some trial and error — using too much negates the smoothing benefit for finer hair types.

Ratings

The scores below for the Liquid Keratin Deep De-Frizz Conditioner 33oz were generated by our AI engine after processing thousands of verified global reviews, with spam, bot activity, and incentivized submissions actively filtered out. Each category reflects the honest distribution of real buyer experiences — including the friction points that too many review summaries quietly omit. Where opinions split sharply across hair types or use cases, those divisions are captured in the scores rather than averaged away.

Frizz Control

88%

This is the category where the keratin conditioner earns its reputation most consistently. Users with coarse, thick, or humidity-prone hair report that frizz becomes noticeably more manageable within the first few washes, and that the effect holds up reasonably well even in muggy summer conditions. The dual-action approach — immediate smoothing plus gradual buildup — is something reviewers frequently call out as a real differentiator.

Results are meaningfully less dramatic for people with fine or low-porosity hair, where the smoothing effect can feel subtle at best. A portion of reviewers also note that the frizz control does not fully survive high humidity the way a professional in-salon keratin treatment would, which can be a letdown for buyers who misread the product's positioning.

Hydration & Moisture

91%

Hydration is arguably where this de-frizz treatment performs most reliably across all hair types. Users consistently describe hair feeling softer and more pliable after even a single use, and those with severely dry or bleach-damaged hair report a noticeable recovery in texture over two to three weeks of regular conditioning. The moisture seems to penetrate rather than just coat.

For already well-hydrated or naturally oily hair, the richness of the formula can tip into over-moisturization — leaving hair feeling slightly heavy or lacking its usual body. A few users mention needing to reduce their application amount significantly compared to what they use with lighter conditioners.

Formula Safety

93%

The paraben-free and sodium chloride-free formulation is a genuine selling point, not just a marketing label. Users who have had professional keratin smoothing treatments, relaxers, or color services specifically seek out this profile because salt and parabens are known to accelerate color fade and break down treatment bonds. It is one of the few larger-bottle conditioners that checks both boxes.

While the formula avoids the most commonly flagged additives, it is not fragrance-free — which matters to a meaningful subset of buyers with scalp sensitivity or fragrance allergies. The absence of a full ingredient list on some retail listings has also frustrated buyers who need to vet every component before purchase.

Value for Money

76%

24%

The 33oz size genuinely stretches the per-wash cost well below what you would spend on equivalent salon-brand conditioners bought in smaller bottles. For households with multiple users, or for people who deep condition multiple times a week, the math works in the product's favor over a few months of use.

The upfront price is a barrier for first-time buyers who are not yet sure the formula suits their hair — there is no smaller trial size available to test it before committing. Buyers with fine hair who end up needing to use very little per application may find the value proposition less compelling, since the bottle lasts almost too long before they can justify repurchasing.

Scent

58%

42%

Some users genuinely enjoy the fragrance, describing it as a clean, professional scent that fades pleasantly after rinsing. For this group, it is a neutral-to-positive experience that does not interfere with their other personal care products or perfumes.

The scent is one of the most consistently polarizing aspects of the Liquid Keratin conditioner in user reviews. Those who find it unpleasant describe it as sharp or chemical-adjacent, and a handful note that it lingers on the hair longer than expected. For anyone with fragrance sensitivities, this is a meaningful concern that the product does not address.

Texture & Consistency

82%

18%

The conditioner has a smooth, fluid consistency that spreads easily through wet hair without requiring a lot of physical effort to distribute. Users with thick or tangled hair appreciate that it detangles on contact, making the conditioning step feel efficient rather than laborious.

The liquidity of the formula means it can run quickly in the shower, making portion control tricky — especially for people used to thicker cream conditioners. Some buyers mention accidentally using more than intended in early uses before they calibrate how much they actually need.

Performance on Chemically Treated Hair

89%

This is one of the clearest strong suits of this keratin conditioner. Users who have had Brazilian blowouts, Japanese straightening, or standard relaxers report that regular use extends the life and feel of those treatments noticeably. The salt-free formula means color-treated users also see less washout between appointments.

The benefit is most pronounced as a protective maintenance tool — users who have let their treated hair become significantly damaged before starting use may need several weeks before they see meaningful recovery, and expectations need to be managed accordingly.

Ease of Application

84%

The product integrates cleanly into an existing shower routine without any special steps or tools. Users report that two to five minutes of leave-in time is enough to feel a difference, and those who occasionally extend that to ten minutes under a shower cap note an enhanced softness that feels closer to a professional treatment.

The large bottle is somewhat unwieldy in a small shower caddy, and the cap design has been called out by a few buyers as prone to dripping. There is also some trial and error in finding the right amount per use — the product does not come with clear dosage guidance.

Rinse-Out Clean Feel

79%

21%

For most hair types, the conditioner rinses out fully without leaving a coating or residue that weighs hair down post-shower. People with coarse or porous hair in particular tend to feel the benefits without feeling like anything is sitting on their strands.

For finer or less porous hair, residue buildup is a recurring complaint when the product is used too frequently or in too large a quantity. Several users mention needing to clarify with a deep-cleansing shampoo every couple of weeks to reset their hair when using this keratin conditioner regularly.

UV & Environmental Protection

71%

29%

The inclusion of UV protection is a practical bonus that most users do not expect from a rinse-out conditioner. Buyers who spend significant time outdoors — runners, people who work outside, beach-goers — appreciate the added layer of defense against sun-related dryness and color fade.

The level of UV protection offered by a rinse-out conditioner is inherently limited compared to leave-in formulas or dedicated hair sunscreens. Users should not rely on this as their primary UV defense, and the product does not specify SPF equivalency, making it difficult to gauge how much protection it actually delivers.

Longevity Between Washes

74%

26%

A consistent thread in positive reviews is that the softness and reduced frizz carry over meaningfully into the days following a wash — hair does not snap back to its baseline level of coarseness or volume the moment it dries. For people who wash two or three times a week, this residual benefit adds up.

By the second or third day post-wash, the smoothing effect does fade noticeably for most users — particularly in humid environments. This is expected behavior for a rinse-out conditioner, but buyers who are hoping for week-long smoothness will likely be disappointed without layering in a leave-in product.

Packaging & Bottle Design

63%

37%

The large format bottle is clearly designed for utility rather than luxury aesthetics, and buyers shopping for value over presentation tend to appreciate that. The straightforward labeling makes it easy to identify the product and understand its core purpose at a glance.

The bottle design has earned consistent criticism for being impractical in the shower — it is tall, somewhat slippery when wet, and the opening drips more than it should. A pump dispenser would dramatically improve the experience, but the standard cap requires tipping the bottle upside down and guessing at the right amount.

Suitability for Fine Hair

47%

53%

Fine-haired users who use a very small, carefully controlled amount — focused strictly on the ends — do report some improvement in smoothness and a reduction in static. Used sparingly and infrequently, it can fit into a fine-hair routine without causing issues.

This is objectively one of the weaker fits for the formula. Most fine-hair reviewers report that even modest amounts leave their hair feeling flat, weighed down, or visibly greasy. The product is designed for thicker, coarser hair profiles, and the formula density reflects that — fine-haired buyers are generally better served by a lighter alternative.

Brand Credibility

81%

19%

Liquid Keratin occupies a credible niche in the professional keratin care space, and buyers who are familiar with keratin-based hair care tend to recognize and trust the brand. The professional positioning gives first-time buyers confidence that the ingredient claims are grounded in real formulation expertise.

The brand has less mainstream visibility than mass-market competitors, which means new buyers often encounter it only through targeted searches rather than broad brand recognition. Some users feel that customer support responsiveness and product documentation — like full ingredient lists — could be stronger given the professional positioning.

Suitable for:

The Liquid Keratin Deep De-Frizz Conditioner 33oz is a strong fit for anyone whose hair regularly battles frizz, dryness, or the aftermath of chemical processing. If you've had a professional keratin treatment, relaxer, or color service and need a conditioner that won't undo that work, this de-frizz treatment is specifically formulated to be compatible — its sodium chloride-free and paraben-free makeup means it won't strip pigment or weaken treatment bonds. It's also a smart pick for people with coarse, thick, or humidity-prone hair who want gradual, cumulative smoothing without booking salon appointments every few weeks. The large 33oz bottle — about three times a standard conditioner — makes particular sense for households with multiple users, or for anyone who deep conditions on a weekly schedule and goes through product quickly. If you're someone who prioritizes clean-ish formulas and sun exposure is part of your daily life, the added UV protection is a quiet but practical bonus.

Not suitable for:

The Liquid Keratin Deep De-Frizz Conditioner 33oz is not the right choice for anyone expecting results similar to an in-salon keratin straightening treatment — this is a rinse-out conditioner that improves manageability over time, not a permanent or semi-permanent smoothing service. People with naturally fine or low-density hair may find the formula too heavy, and over-application can leave strands feeling limp rather than light and bouncy. If you tend to use conditioner sparingly or only wash your hair once a week, the large bottle size may feel like more commitment than necessary — you'd be sitting on product for a long time. Those with very sensitive noses should know that the scent has been a sticking point for some users, and it isn't a fragrance-free formula. Finally, if your hair is already healthy, well-moisturized, and relatively smooth, the keratin conditioner may not offer enough noticeable difference to justify its price point over a simpler, less specialized option.

Specifications

Volume: Each bottle contains 33 fluid ounces of conditioner, roughly equivalent to three standard-sized conditioner bottles.
Dimensions: The bottle measures 3.5 x 3.5 x 10 inches, making it tall but manageable on a shower shelf.
Weight: The filled bottle weighs 2.25 pounds, which is substantial but expected for a professional-size hair care product.
Item Form: The product is a liquid conditioner intended to be applied to wet hair and rinsed out after use.
Key Ingredient: Keratin protein is the active ingredient, used to replenish and reinforce the natural protein structure of the hair shaft.
Hair Types: Formulated for all hair types, with particular effectiveness on dry, damaged, coarse, and chemically treated hair.
Frizz Control: Provides both immediate smoothing upon first use and cumulative frizz reduction with continued regular application.
UV Protection: The formula includes ingredients that help shield hair from sun-related damage while simultaneously moisturizing.
Paraben Status: The formula is completely paraben-free, making it suitable for those avoiding synthetic preservatives commonly found in mainstream conditioners.
Salt Content: Sodium chloride is entirely absent from the formula, which is essential for preserving the results of professional keratin and color treatments.
Chemical Safety: Safe for use on chemically treated hair including keratin-straightened, relaxed, permed, and color-treated hair.
Primary Benefit: The core function is deep hydration and smoothing, aimed at restoring softness, shine, and manageability to compromised hair.
Manufacturer: Made by Liquid Keratin, a brand focused on professional keratin-based hair care products for at-home use.
Availability: The product has not been discontinued by the manufacturer and remains in active production as of the latest available information.
Product Category: Ranked within the Deep Hair Conditioners subcategory on major retail platforms, confirming its classification as a treatment-level conditioner.

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FAQ

It is a rinse-out conditioner, not a keratin straightening treatment. The Liquid Keratin Deep De-Frizz Conditioner 33oz replenishes keratin protein in the hair over time, which reduces frizz and improves smoothness — but it does not chemically alter the structure of your hair the way an in-salon keratin service does. Think of it as maintenance, not a transformation.

Yes, and it is actually one of the better use cases for this product. The formula is sodium chloride-free and paraben-free, which means it will not strip or degrade the results of your in-salon keratin service the way many standard conditioners can. It is specifically designed to be compatible with professional chemical treatments.

That really depends on your hair length, thickness, and how often you wash. For someone with shoulder-length hair who washes three times a week and uses a generous amount, the bottle could last two to four months. For a household with multiple users or very thick, long hair, expect it to go faster — but it still outlasts most standard conditioner sizes by a wide margin.

Many users report noticeably softer and smoother hair after just the first or second use. That said, the more significant frizz-reduction benefits tend to build up over several weeks of consistent use. Hair that is very porous or heavily damaged may take a little longer to show improvement.

It can, if you apply too much. Fine hair is more susceptible to feeling heavy or greasy when conditioner is over-applied, and this is a richer formula than a lightweight everyday conditioner. If you have fine hair, start with a small amount focused on the mid-lengths and ends, and avoid applying it close to the scalp.

It performs reasonably well in humidity, which is one of the more common reasons people gravitate toward keratin-based products. The smoothing effect does help hair resist puffing up in humid conditions. However, results can vary depending on your hair type — coarser and thicker hair tends to respond more dramatically than fine or already-smooth hair.

The scent is noticeable during application and has divided user opinion — some find it pleasant, others find it overpowering. After rinsing, the fragrance generally fades significantly. If you are highly fragrance-sensitive or prefer unscented products, that is worth factoring into your decision.

Standard usage is two to five minutes, similar to most deep conditioners. Leaving it on a bit longer — up to ten minutes under a shower cap — can enhance the hydrating effect, especially if your hair is particularly dry or damaged. There is no specific guidance suggesting you need to leave it on longer than that for the keratin benefits to take effect.

Yes. The absence of sodium chloride and parabens makes this keratin conditioner a solid choice for color-treated hair. Sodium chloride in particular is known to fade hair color faster, so using a salt-free conditioner is a meaningful advantage if maintaining your color is a priority.

It is designed for regular use and can be used every wash if your hair tolerates it well. For dry, coarse, or chemically treated hair, frequent use is generally beneficial. If you have fine or oily hair, you may want to alternate it with a lighter conditioner to avoid buildup. There is no requirement to use it sparingly.

Liquid Keratin Deep De-Frizz Conditioner 33oz

Overview

Features & Benefits

Best For

User Feedback

Pros

Cons

Ratings

Frizz Control

Hydration & Moisture

Formula Safety

Value for Money

Scent

Texture & Consistency

Performance on Chemically Treated Hair

Ease of Application

Rinse-Out Clean Feel

UV & Environmental Protection

Longevity Between Washes

Packaging & Bottle Design

Suitability for Fine Hair

Brand Credibility

Suitable for:

Not suitable for:

Specifications

Related Reviews

FAQ

Is this actually a keratin straightening treatment, or just a regular conditioner?

Can I use this keratin conditioner after a professional keratin treatment?

How long does the 33oz bottle actually last?

How quickly will I notice a difference in my hair?

Will this weigh down fine hair?

Does this de-frizz treatment work well in humid climates?

Is the scent strong, and does it linger after rinsing?

How long should I leave the conditioner on before rinsing?

Is this conditioner safe for colored or highlighted hair?

Can I use this every time I wash my hair, or only occasionally?