The 4 Best Keratin Hair Straighteners (Reviews)

If you’re looking for an alternative to the latest trend of Keratin treatment or simply looking for a flat iron that’ll nourish your hair in addition to straightening it, a Keratin flat iron is all you need.

Featured Image of Best Keratin Flat Irons

A Keratin hair straightener not only tames your dry, dull, brittle hair, but it also resuscitates it long term.

In this article, we’ll talk about various aspects of some of the most popular Keratin flat irons and discuss the benefits they provide.

If you see the value in these products and choose to purchase via my referral links, I may earn a small commission at no extra cost to you.

CHECK: Best Hair Straightener for Car

Best Keratin Flat Irons at a Glance

We’ve spent hours testing and reviewing some of the best keratin flat irons. Before we get into their details, let’s take a quick peek at them. 

Don’t have time? Here is a quick comparison of our favorites!

Editor's Choice
MHU Professional 1 Inch Keratin Ion Flat Iron Tourmaline Ceramic Hair Straightener Instant Heat Up Auto Shut-Off Adjustable Temperature with LED Display Black (285°F-450°F)
CROC Premium Flat Iron, Black
Keratin Complex Stealth V Digital Smoothing & Straightening Iron
Top Benefit
High-end results for a budget-friendly price
Works for every hair type
Their very own SmartPro sensor technology swiftly detects the moisture level of your hair.
CROC Premium Flat Iron, Black
Top Benefit
Works for every hair type
Check Latest Price
Keratin Complex Stealth V Digital Smoothing & Straightening Iron
Top Benefit
Their very own SmartPro sensor technology swiftly detects the moisture level of your hair.
Check Latest Price

Top Keratin Hair Straighteners

A Keratin hair straightener is almost like your own Keratin treatment at home.

So, buying the best Keratin hair straightener is key to get the most out of this treatment. The trend is becoming more popular, and the well-renowned brands are producing dozens of such irons.

BabylissPro, Philips, Lumabella Keratin touch series, Remington SmartPro, and KIPOZI Pro are a few worth mentioning.

Each of them has its own specialties, yet not all of them come with the key features required to properly heal your hair.

More importantly, their performance will vary as well. So you must be wise with your selection to get a flat iron that will give you the best outcome.

Let’s introduce you to some of the most popular Keratin flat irons available. We hope our thorough research and comprehensive discussion will make it easier for you to make the perfect selection.

Before we dive deeper, have a closer look at the chart below and compare their features.

#1 MHU professional Keratin Flat iron

MHU flat iron

Ranking Position: 1

Our Opinion: Winner

You will love this flat iron! It has user-friendly features that women from all walks of life can confidently use.

If you are shopping for a flat iron to help you get rid of hair frizz or achieve perfectly straight hair, then you are looking at a competent product that will deliver.

What to love about the MHU Keratin Flat Iron

  • Heats up almost instantly (in just about 30 seconds). 
  • Adjustable temperature – choose from 285°F to 450°F.
  • Auto-shutoff feature for added safety, especially for at-home use.
  • Ideally placed buttons for hassle-free and convenient use.
  • Dual functionality – straight or wavy, this flat iron will help you achieve the stylish look you want.
  • Made with tourmaline and ceramic plating for a shiny and healthy look after styling.
  • Slides over your hair easily (no more painful hair pulling).
  • High-end results for a budget-friendly price.
  • It has the right size, lightweight, and durable.

For girls who have naturally thin and fine hair, this hot tool is your best bet. Tourmaline ceramic plating will help protect your hair as you style.

Compared to metal plated flat irons like titanium hair straighteners, a tourmaline plated iron is easy and gentle even for brittle hair. 

What’s most interesting about the MHU flat iron is its keratin ion plate. We know that frequent heat-styling may lead to hair damage, but with keratin ion technology, you have the gentlest tool in your hands to help you get silky straight hair. 

While ceramic flat irons are most suitable for fine and thin hair types, it is also great for straightening wavy and curly hair. Just choose the right temperature to achieve your desired look.

One thing to note about using hot tools is your pre-styling routine.

If you plan to straighten your hair regularly, it’s best to apply hair protectants to achieve your hair’s best styling potential and keep it healthy.

The ceramic tourmaline ionic flat iron from MHU is a simplistic Keratin flat iron suited for all hair types. The long tongs of this unit provide additional comfort while styling.

However, the lack of a smart temperature adjustment system takes it a few steps back since you’ll have to be wary about burn protection.

It disappointingly lacks a moisture adjustment feature as well, which leaves you risking your hair with improper moisture levels.

So you may not get the luster you’re craving for. 

The iron also lacks floating plates and plate locks, adding up to its ineffectiveness. So keep that in mind, nevertheless, it is an amazing product.

MHU Professional 1 Inch Keratin Ion Flat Iron Tourmaline Ceramic Hair Straightener Instant Heat Up Auto Shut-Off Adjustable Temperature with LED Display Black (285°F-450°F)
  • ❤ Suited For All Hairstyles & Types: Benefit from a finely-proportionate build that measures 10.8 inch in length and 1 inch in width to suit both short and long hair
  • ❤ Instant Heating MCH & Ceramic Coating: Heats up to 450 ℉ in only 30 seconds for fast straightening; Ceramic construction allows for a smooth operation without pulling the hair
  • ❤ Adjustable Heating Settings & Temperature Memory Function: Adjustable temperature from 285 °F up to 450 °F suits fine, normal, and even thick hair; it could quickly reach your uaually using temprature.
  • ❤ Safe Design & Operaiton: Turns automatically off after 60 minutes for extra peace of mind
  • ❤ Easy To Use & Curl: 360 degrees angle free swivel cord

#2 CROC Flat Iron

Stock photo

Ranking Position: 2

Our Opinion: Runner-up

Are you looking for a flat iron that gives you great smoothening results even for resistant hair? The CROC Classic Silver Titanium Flat Iron will give you the super sleek and smooth finish you desire. 

Ceramic ones might be good for some hair types; however, if your hair is difficult to straighten no matter how many passes you do to your hair, then a titanium-plated iron will work best for you.

Flat irons are not created equal. Some have ceramic plates that don’t work well for coarse and thick hair.

As a matter of fact, titanium plates are ideal for curly and textured hair types.

If you’re all for quality and affordability, the CROC hair straightening tool is one of the best on the market. This iron really does wonder for stubborn curls. 

If you want to get a flat smooth result, titanium flat irons work best regardless of your hair type.

The main highlights of this hair-straightening iron are:

  • Heats up in about 1-2 minutes.
  • Can hold heat well.
  • Straightens out your hair evenly (not leaving out certain areas).
  • Perfect even weight.
  • Adjustable temperature settings.
  • Glides smoothly on hair.

There is really nothing to dislike about this flat iron. The only thing to be careful about, especially if it is your first time using a heat styling device, is to be mindful of the heat setting.

Because titanium iron gets hot very fast, if you don’t use it properly, you can end up burning your hair.

But following the instructions and doing pre-styling preparations should help keep any unwanted results at bay.

If you have naturally thick, curly, or kinky hair, this tool is highly recommended.

#3 Remington S8598S Flat Iron

Remington flat iron

Ranking Position: 3

Our Opinion: A Smart Alternative

Unlike the previous two, Remington’s hair straightener doesn’t come with the Sol-Gel technology or premium grade titanium plates.

Instead, this flat iron comes with quality ceramic plates and a SmartPro sensor to ensure secure straightening and a sleek finish.

Their very own SmartPro sensor technology swiftly detects the moisture level of your hair.

It adjusts the proper heat within seconds to make sure you experience the ultimately safe and gentle styling at home.

The 1-inch ceramic plates are infused with an Almond-Keratin combo for a smoother glide and additional conditioning.

The combination reduces hair damages, splits, or coarseness three times more than regular hair straighteners.

Furthermore, the plates are constructed to give you a residue-free styling experience despite their seemingly oily surface.

These plates take only up to 15 seconds to heat up. You can adjust the temperature from five adjustable heat settings that reach up to 450-degree Fahrenheit.

With the help of its smart sensor, you can lock the temperature once you find a suitable level.

Among the many convenient features of this flat iron, the silicone sleeve is one of the best.

The wise inclusion allows you instant storing of the unit without having to wait for its cooldown. It’s a great feature to have if you happen to be styling on the go.

The relatively inexpensive flat iron is an efficient solution to nourish and style both the soft and hard to tame hair variations at home.

Additional Features

  • 1-inch quality ceramic plates.
  • Almond oil micro conditioners for perfect long-lasting gloss.
  • Flexible floating plates for constant contact, even heat distribution, and a smoother glide.
  • The plates have precisely curved edges for convenient movement and easy reach to the roots.
  • Salon length swivel cord.
  • 1-hour auto shut-off.
  • Protective hinge locks.

Remington S8598 Smartpro Straightener, Grey, 1 Count
  • 3x less damage: so long to heat damage. Smartpro heat sensor technology uses the most comfortable heat levels to quickly achieve straight styles. Vs standard Remington straighteners
  • Patented sensor technology: The SmartPRO adjusts heat levels automatically by monitoring the temperature and moisture level of hair. This smart technology leads to healthy, beautiful styles.
  • 60-Min. Auto shutoff: A 60-minute auto shutoff feature lets you OPERATE the straightener with peace of mind every time.
  • Tangle-free swivel cord: Style comfortably at any angle with the salon-quality, 360 Degree swivel cord.
  • 1" Ceramic floating plates: Ceramic helps fight frizz while the floating plates stay in constant contact with hair for a smooth, comfortable glide.

The Reasons We Do Not Recommend the Following:

Keratin Complex Stealth V Digital Smoothing Iron

MHU flat iron

This popular Keratin flat iron comes with titanium ceramic plates. The unusual yet ergonomically designed flat iron offers a comfortable hold with easy movement.

The product claims to provide extra smooth hair within seconds, which we reasonably doubt. Here’s why.

It lacks a smart moisture adjustment system, a key feature for Keratin infused hair straighteners.

As a result, it fails to determine the required moisture for your hair. So the protein emission happens without proper balance.

Moreover, the absence of a temperature auto-lock functionality worsens things up since it leaves your hair vulnerable to burns unless you’re well aware of your hair’s moisture levels and temperature settings.

Additionally, the lack of floating plates, inappropriate temperature setting for delicate hair, and a longer heating time indicate this high-priced flat iron’s incompetency.

Keratin Complex Stealth V Digital Smoothing & Straightening Iron
  • Straighten and Smooth away Frizz
  • Keratin Complex
  • Next Generation Digital Iron
  • Cool-touch technology provides maximum comfort during use

A Comparative Chart for Clarification

PropertiesLa-Brasiliana Professional Titanium Flat IronOne-n-Only Brazilian Tech™ Keratin Flat IronRemington S8598S Flat IronMHU Professional Keratin Ion Flat Iron
Plate MaterialTitaniumTitanium CeramicCeramicCeramic Tourmaline
Smart Moisture AdjustmentYesYesYesNo
Adjustable Temperature300-450℉300-450℉300-450℉285-450℉
Temperature Auto LockYesYesYesNo
Heating Time10s15s15s30s
Residue-free StylingYesYesYesNo
Ionic TechnologyYesYesYesYes
Floating PlatesYesYesYesNo
Rounded EdgesYesYesYesYes
Plate ProtectorsYesYesYesNo
Price Range($)Less Than 100Less Than 100More Than 50Less Than 50

READ MORE: Keratin Vs Straightening Permanently

Keratin Flat Irons Buying Guide

What Is a Keratin Hair Straightener?

The functionality goes precisely with the name. These flattening irons are equipped with Keratin-infused plates.

Keratin is a building block protein that is key for the anatomy of your hair, nails, and skin.

This delicate element, once damaged, can affect the new cells beneath your hair by no longer protecting them. It causes hair damage, rough and dry hair, and even brittle hair.

Having been infused with Keratin protein, a Keratin hair straightener preserves your hair’s natural protein and locks the moisture.

It eliminates frizz and gives your hair a revived look while protecting it from extreme heat settings.

With specific properties, the micro Keratin conditioners strengthen your hair long term.

Furthermore, keratin flat irons hardly lack the functionalities of traditional flat irons. They can be heated as much as your regular flat iron, so you can straighten your hair the way you are accustomed to.

Additionally, their design is pretty similar as well. The best thing regarding these flat irons is, they suit every hair type. They provide excellent nourishment and revamp your hair texture.

READ MORE: Keratin Treatment Side Effects

Types of Keratin Flat Irons

There are two types of Keratin flat irons to choose from depending on the needs of your hair. They are the following:

1. Keratin Flat Irons With Keratin Infused Plates

This is mainly the type by which we define a Keratin flat iron. It’s the type we have already discussed in our previous segment.

The plates can be infused with argan oil or different proteins along with Keratin.

Titanium or Ceramic plates are infused with micro conditioners that help resuscitate your hair.

They are also great for making your hair look glossy and shiny. These flat irons are excellent alternatives to Keratin treatment.

2. Flat Irons That Protect Keratin Treated Hair

This type of hair straightener is hardly different from traditional hair straighteners. They don’t have keratin infused plates but have all the traits of your regular flat iron.

The significance of these flat irons is they protect and preserve Keratin treated hair.

To further clarify, you’ll need a protective flat iron once you’ve had a thorough Keratin treatment or a Brazilian blowdry.

In general, your hair retains the effect of such treatments for up to five months. If you feel like straightening during this period, you’ll have to use a Keratin protect flat iron.

It would be best if you always used a protective flat iron for your Keratin treated hair since the regular ones may totally ruin your hair’s polished look.

A protective flat iron detects and maintains the extent of heat necessary for your treated hair and protects it from overheating. It also preserves the nutrients beneath the hair strands and prevents damage.

The Profashion Steam Infrared Heat Ceramic Flat Iron and CROC New Classic Flat Iron are among our favorite protective flat irons for Keratin treatment protection.

You can also go for the Karma Beauty Professional Titanium Hair Straightener if you are on a budget.

Related: How Soon Can You Repeat Keratin Treatment?

Key Differences Between Keratin Flat Irons & Traditional Flat Irons

There are several dissimilarities between Keratin hair straighteners and traditional straighteners. Let’s take a look. 

Keratin Infusion

This dissimilarity undoubtedly tops the list. Traditional flat irons don’t come with Keratin infused plates.

Importance of Plate-material

Flat Iron Heating Plate

Choosing the plate material becomes a vital part when you buy a traditional flat iron.

Namely, titanium for thick hair, ceramic for thin hair, that’s how you usually make the selection.

For Keratin flat irons, on the other hand, this is hardly an issue. The infused plates hardly affect your hair as long as they’re able to detect the temperature necessary for your hair, no matter if the material is titanium or ceramic. However, titanium plates heat up faster with better heat level retention.

Moisture Detection and Lock Functionality

This is one of the core features of Keratin flat irons. It helps balance the moisture levels and protein infusion while also ensuring the consistency of moisturization.

In contrast, traditional hair straighteners care little about the moisture levels of your hair.

The Advantages

  • Provides the necessary protein required for your hair.
  • Suits every hair type.
  • The quickest solution to get rid of frizzy, dry, or damaged hair.
  • Nourishes and heals your hair long term.
  • Protects the cells underneath your hair strands.
  • If the micro Keratin conditioners reach the root of your hair regularly, it’ll maintain the proper growth of your hair.
  • Detects and locks the necessary moisture of your hair.
  • Gives your hair a glossier and shinier look and a lasting result.
  • A cheaper alternative to Keratin treatment or Brazilian straightening.

The Disadvantages

  • You’ll have to buy another one once you’ve used up all the infused Keratin. This can happen in less than a year.
  • Takes high maintenance. The plates, along with the effectiveness of protein wane away fast if not securely stored.

The Core Features of a Keratin Infused Hair Straightener

There are some core features you’ll find in Keratin hair straighteners, distinguishing their capabilities from others.  We have listed these special functionalities below:

Keratin Infused Plates

Keratin Infused Plate

Undoubtedly, this is the trait for which the flat iron is named. As we have mentioned above, the plates of these flat irons are infused with Keratin protein, which allows you to heal and straighten your hair in one go.

This protective protein is less prone to tearing or scratching than the other cell types produced by your body.

And it makes up both your hair and skin. As a result, when the hair cuticle absorbs this vital cell element, it strengthens your hair, the root of your hair, and scalp altogether to give you stronger and healthier hair.

So when you take a Keratin treatment or a Brazilian blowout straightening, it revitalizes your hair and your scalp.

Furthermore, the result lasts quite long; hence, why the trend is becoming more popular.

Since the cost of such treatments is expensive, Keratin hair straighteners can be a cheaper alternative.

They provide your hair with the same protective protein similar to those treatments.

Namely, they smooth down your overlapping hair cells with each use, and your damaged, dry, frizzy hair heals fast.

In contrast, your hair gets damaged and brittle when it lacks this protein. Besides, this lacking causes rough cracked scalps.

Optimal Use of Ionic Technology

Ionic technology in flat irons is pretty much the norm. The negative ions are responsible for smoothing your hair strands, reducing frizz.

You can make the best out of this technology using a Keratin hair straightener. The ions, rich in protein, work faster on your hair than traditional ionic hair straighteners since your scalp absorbs the protein for quick healing.

Working only on strands, ionic hair straighteners without protein infusion cannot smooth down your hard to tame hair strands as fast as Keratin hair straighteners.

So you’ll be glad to have this feature in your straightener for quicker results.

Smart Moisture Adjustment

Moisturized Hair

Keratin flat irons boast moisture detection and locking functionality. It’s an important feature for proper nutrition of your hair and precise hair straightening.

When you apply heat to your hair using a regular straightener that lacks such functionality, it heats your hair regardless of your hair’s existing moisture.

So, if your hair happens to be moistened already, the possibility of burning your hair will be there if you do not adjust the temperature properly.

Moreover, even if it doesn’t burn your hair, the natural moisture can be lost, resulting in hard to recover rough and dull hair.

On the other hand, Keratin hair straighteners, with the moisture detection and locking technology along with the temperature auto-lock feature, detect the moisture of your hair.

It then makes sure your hair gets the precise amount of heat and protein infusion required for your hair.

As a result, there remains no risk of burns nor the risk of an overly dampened look. Besides, straightening becomes a lot easier.

Temperature Adjustment and Auto-lock

This is a must-have feature for a good protein infusion flat iron. With this feature, a Keratin infused flat iron ensures your hair gets the proper heating without the risk of burns.

This ancillary feature to the smart moisture adjustment system detects and locks the necessary heat to seal the required moisture.

If your protein infused iron lack this feature, your hair might get affected by improper moisture adjustment.

So a temperature setting higher than necessary can burn your hair, and a lower setting can disrupt the moisture levels. Thus, both are harmful to your hair.

Quick Heating

Quick Heat Up - V1 Aug

These hair straighteners heat up quicker than every other hair straightener type. It’s an essential feature to have for quick styling.

However, for a protein-infused flat iron, the feature is even more important to have a longer lifespan.

If your Keratin iron takes longer to heat up, suppose a minute, the infused protein ions start evaporating during this period. Despite being a slow process, it makes the protein wane faster in the long run.

A good iron won’t take more than 20 seconds to heat up, saving your time and extending its life.

Plate Protectors

Keratin flat irons or any other protein infused flat iron comes with delicate plates that get easily damaged if not stored securely.

The shock-sensitive plates break easily. Besides, dust whits mar the infused micro-conditioners undermining their effectiveness if you leave the plates in open air for too long.

Therefore, it’s important for your flat iron to have plate protectors so the plates remain secured when not in use.

It’s a trait every top flat iron possesses. They either come with hinge locks or protective sleeves, or both.

The sleeves come in real handy as a quick storage solution for hot plates when you’re in a hurry.

These protectors secure the plates from unwanted scratches, breakage, and preserve the infused protein micro-conditioners’ effectiveness. Besides, they spare you a headache while traveling.

Additional Features:

  • Ceramic, ceramic tourmaline, titanium, and titanium tourmaline plates with a smooth surface.
  • You can adjust the temperature within a 300-450 Fahrenheit range.
  • Floating plates for even heat distribution in every hair section.
  • Rounded plate edges for easy maneuvering and proper reach of every hair section. They are also helpful for additional styling options including curls, flips, and waves.
  • Offers residue-free operation for a healthy scalp and sturdy root.

Features to Look Out For

Before you purchase a Keratin infused flat iron, don’t forget to compare the key features. The below chart shows the vital features your flat iron should have.

Plate MaterialCeramic, Ceramic Tourmaline, Titanium, or Titanium Tourmaline
Smart Moisture AdjustmentMust Include
Adjustable Temperature300-450℉
Temperature Auto-lockMust Include
Heating TimeMaximum of 20 Seconds
Ionic TechnologyMust Include
Floating PlatesMust Include
Plate ProtectorsMust Include

A Few Tips From Our Experts

As we’ve mentioned before, styling your hair with a Keratin flat iron is “almost” similar to having a Keratin treatment at home. But again, it’s literally not the solution.

So our experts provided some secrets that’ll help you get along with Keratin protein and retain the effects all the time.

  1. Avoid washing your hair frequently.
  2. Use shampoo free of sodium Laureth sulfate or sodium lauryl sulfate.
  3. Never forget to blow dry your hair after each shower. Avoid hair supplements after the initial shampoo.
  4. Avoid greasing your hair through excessive touching.
  5. Lessen the use of hair clips. Avoid ponytails and braids.
  6. Sleep on a silk pillowcase instead of cotton.

Final Words

The latest trend regarding Brazilian blowouts is surely a tempting one, and so is the idea of having it done by a professional.

While this temptation can cost you a lot, a Keratin flat iron could be a big money saver in the longer term.

By now(we hope), you must have a comprehensive idea about Keratin hair straighteners.

Now you know how they work, why you need one, and what will suit you best. So, make your selection wisely, get majestic hair at home.

MHU Professional 1 Inch Keratin Ion Flat Iron Tourmaline Ceramic Hair Straightener Instant Heat Up Auto Shut-Off Adjustable Temperature with LED Display Black (285°F-450°F)
  • ❤ Suited For All Hairstyles & Types: Benefit from a finely-proportionate build that measures 10.8 inch in length and 1 inch in width to suit both short and long hair
  • ❤ Instant Heating MCH & Ceramic Coating: Heats up to 450 ℉ in only 30 seconds for fast straightening; Ceramic construction allows for a smooth operation without pulling the hair
  • ❤ Adjustable Heating Settings & Temperature Memory Function: Adjustable temperature from 285 °F up to 450 °F suits fine, normal, and even thick hair; it could quickly reach your uaually using temprature.
  • ❤ Safe Design & Operaiton: Turns automatically off after 60 minutes for extra peace of mind
  • ❤ Easy To Use & Curl: 360 degrees angle free swivel cord


Last update on 2022-05-16 / Affiliate links / Images from Amazon Product Advertising API