Best Flat Irons for Keratin Treatments – 2019 Round-up

When looking to repair your hair, a keratin treatment can have some mind-blowing results. However, few people realize that for keratin treatments to be effective, you need a good flat iron to seal the treatment. From high heat to titanium blades, here is everything you need to know about selecting a flat iron to use on a keratin treatment for the best results.

Comparison of the Best Flat Irons for Keratin Treatment




BaBylissPRO Nano Titanium-Plated Ultra-Thin Straightening Iron

BaBylissPRO Nano Titanium-Plated Ultra-Thin Straightening Iron, 1 Inch

Best Overall

KIPOZI Pro Nano-Titanium Hair Straightener Flat Iron

KIPOZI Pro Nano Titanium Flat Iron Hair Straightener with Digital LCD Display, Heats Up Instantly, A High Heat of 450 Degrees, Dual Voltage, 1.75' Wide Plate(Blue)


Keratin Complex Stealth V Digital Smoothing and Straightening Iron

Keratin Complex Stealth V Digital Smoothing and Straightening Iron

Best for the Money

LumaBella Keratin Dual Touch Hair Straightener

LumaBella Keratin Dual Touch Hair Straightener with Keratin Micro, Keratin Dual Touch Styler

What is Keratin Treatment?

Keratin treatment is a method that temporarily straightens the hair. Hair, itself, is mostly made from keratin so this treatment uses the very protein that you naturally find in your hair. Apply the keratin product, and then seal it using a flat iron, as it locks the keratin into your hair. You must not wash it for 3-4 days after the treatment.

The benefits of a keratin treatment are a straighter hair. For those who like to straighten the hair each day, this can reduce the time taken to blow it dry or straighten it. It reduces frizz considerably, leaving the hair looking much smoother and healthier.

Keratin locked in the hair strengthens it, creating healthier strands. Other methods of straightening the hair, use chemicals that tend to damage it, whereas this treatment actually improves its condition.

Unlike straightening your hair, which can last for 24-48 hours, this treatment can last up to 2 months. It can save a lot of time, that was once spent on straightening and blow drying, and is pretty cost effective.

How to Choose a Flat Iron for Keratin Treatment

In order for a keratin treatment to work,  you need to seal your hair with high heat. The best way to do it is to use a flat iron that reaches a high temperature, that is why you need to find a straightener that has specific requirements.

First, the flat iron needs to reach a temperature of at least 450F. While this is very high for average use, a keratin treatment needs a temperature of 450F of heat to seal. Without it as high as this, you won't retain the keratin in your hair. When looking for a flat iron, try to find one with many temperatures, as you probably won't use it at 450F on a normal basis.

Secondly, you need a flat iron with titanium plates. While ceramic plates are often recommended to protect the hair, it is important that the plates hold the heat throughout the entirety of the sealing process. The problem with ceramic plates is that they tend to lose heat as they are straightening the hair. Titanium, however, holds the heat very well, as it applies direct, high-heat to the hair. It makes it a far better tool for sealing. Although, be careful to look for real titanium plates, as titanium-coated plates don't work so well.

Review of the Best Flat Irons for Keratin Treatment

Below are some of the best options for keratin-sealing flat irons. As you only need a 450F titanium-plated flat iron for keratin treatments, try to consider the other benefits when selecting between these options.

BaBylissPRO Nano Titanium-Plated Ultra-Thin Straightening Iron, 1 Inch


  • It heats up to 450F meaning it gets hot enough for keratin treatments.
  • Its Ryton housing makes it touch-safe to prevent your hands from burning as it heats up.
  • It has 50 heat settings so can be used for a versatile styling when not being used for treatments.
  • The plates are extra-long, so it is capable of straightening more hair at a time than most models.


  • There is no digital readout which makes the exact temperature a little uncertain.
  • The blades are only titanium coated, which means they are likely to lose heat while straightening. It makes this model less suitable for keratin treatments.

This lightweight flat iron has titanium-coated plates. With 50 heat settings, this model has a top temperature of 450F. The heat plates are extra-long, while the casing is touch-safe.

This model is a lightweight option that reaches high enough temperatures. It is questionable, however, as to whether the titanium-coated plates can retain enough heat for a keratin treatment.

KIPOZI Pro Nano Titanium Flat Iron Hair Straightener with Digital LCD Display, Heats Up Instantly, A High Heat of 450 Degrees, Dual Voltage, 1.75' Wide Plate(Blue)


  • It heats up to 450F and the digital screen helps to ensure temperature certainty.
  • There are multiple heat settings for variable styling when not being used for treatments.
  • The plates are very wide which decreases the time taken to flat iron a whole head of hair.
  • The blades are 100% titanium ensuring they retain the heat needed for keratin treatments.
  • The nanotechnology helps to break down water molecules to lock moisture into the hair, preventing damage.


  • The LCD display screen can be a little confusing.
  • This model is quite heavy and can make your arm ache while using it.

This model has 1.75-inch nano-titanium plates. The plates float to prevent hair from getting pinched, and there are multiple heat settings from 170F to 450F. It has an 8-foot swivel cord and a digital display for temperature precision.

This model reaches high temperatures and has 100% titanium plates, making it ideal for keratin treatments. It is a little heavy, but the wide blades mean that it decreases straightening time.

Keratin Complex Stealth V Digital Smoothing and Straightening Iron


  • This model heats very quickly.
  • The cool-to-touch technology makes it safe and comfortable to use.
  • It heats up high which is not only good for a keratin treatment, but also for thicker hair.
  • The adjustable heat settings make it a great choice when you are not using it for treatments.


  • It is quite heavy to work with.
  • Some users have mentioned that it pinches the hair.

This model features glide-on plates and is infused with keratin to provide the hair with keratin treatment while being used. With temperatures from 350F to 450F, the outer coating has the cool-to-touch technology to prevent the casing from heating up.

This model doesn’t make it clear if the blades are 100% titanium, but it reaches a good temperature for keratin treatments. The cool-to-touch makes it more comfortable to use, and the glide-on blades make for swift, easy movement.

LumaBella Keratin Dual Touch Hair Straightener with Keratin Micro, Keratin Dual Touch Styler


  • The floating plates enable better precision when straightening.
  • The plates are infused with keratin to provide conditioning while straightening.
  • The top temperature and the titanium plates make it suitable for keratin treatments.
  • The sensors will help to protect the hair when being straightened normally, preventing high heat from being applied to damaged hair.


  • The backside of the flat iron gets quite hot when in use.
  • The adjusting temperature may be an issue when trying to seal keratin treatments.

With 1-inch floating titanium blades, this model is equipped with sensors that detect dryness to prevent damage by adjusting the temperature. It has a temperature ranging from 300F to 450F and is infused with keratin to condition the hair while in use.

It has all the necessary requirements for you to use it with keratin treatments and has the added bonus of floating plates and dryness sensors. The only issue may be the adjusting temperature when you use it with keratin.


  • It is dual voltage so it can be used abroad.
  • It has very low temperatures for people with thin or damaged hair.
  • It has titanium blades and reaches high enough temperatures for keratin treatments.
  • The intelligent heat settings prevent high heat from being applied to dry or brittle hair.
  • List Element


  • It is quite an expensive model.
  • The swivel cord tends to get tangled easily.

This flat iron has wide titanium plates at 1.5 inches. It has a temperature range of 100F to 450F. It is dual voltage and has automatic shut-off. It has intelligent heat settings, adjusting the temperature when it senses dry hair.

This model is very highly rated. It heats to the desired temperature quickly and retains that heat, straightening all hair types very quickly.

Mistakes to Avoid When Flat Ironing for Keratin Treatment

Be sure to keep these in mind:

Wrong Temperature 

It is imperative to use your flat iron on 450F when applying a keratin treatment to your hair. If you do not do this, you’ll find it doesn’t seal properly.

Wrong Flat Iron

Due to most recommendations, many people have ceramic-plated flat irons. It will not do the trick for keratin treatments as the heat gets quickly lost. For a treatment to be successful, you need to use titanium blades.

No Mask 

While keratin is safer than other chemical treatments, it can be noxious when inhaled and, if inhaled frequently, it can cause problems for the female reproductive system. Wear a mask while performing these treatments.

Don’t Wash it 

You need to keep your hair unwashed for 3-4 days in order to make sure the treatment seals properly. Washing it will just wash the treatment away.


Keratin treatments are a great way to get that smooth, silky feel. Use the correct flat iron, otherwise, you simply won’t get the desired look that you intend to. Make sure the flat iron has titanium plates and can get hot enough to seal the hair. Any mineral infusions to the blades will help to secure that soft, silky feel.

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