best flat iron for thick long hair

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Every hair type has its own quirks and needs, and when it comes to thick hair, the challenge is real. The quest to find the “Best Flat Iron for thick hair” might have brought you from one review to another. Thick hair, while beautiful and voluminous, needs a hair tool that understands its demands. So let’s dive right in!

Best Flat Iron For Thick Hair To Consider

Best One-Pass


:Bio Ionic 10X Flat Iron

Price: $239.99

Buy now

Best Results

Dyson Corrale Hair Straightener Review

:Dyson Corrale Flat Iron

Price: $499.99

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Best Dupe

Conair Infiniti Pro hair straightener

:Conair Rainbow Titanium Flat Iron

Price: $49.99

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Best Safe for Thick Hair

Neuro Halo Flat Iron

:Neuro Halo Flat Iron

Price: $188.00

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Our Rating Criteria

Does plate material matter for thick hair?

Absolutely! But, it can go only so far. The plate material determines how fast and evenly heat is distributed and how smoothly the tool glides through your hair. Ceramic plates are known for even heat distribution, reducing the chance of hot spots. Titanium plates heat up quickly and maintain high heat, making them ideal for thick hair that requires more heat. However, always use a heat protectant, regardless of the plate material.

Ceramic vs Titanium Flat Iron

For an in depth understanding how plate materials and plate coating interact with other flat iron systems, check out this article.

What Other Technologies Matter?

Temperature Safety Circuit:

Safety first! A temperature safety circuit ensures the flat iron doesn’t overheat, which is essential to prevent hair damage, especially for thick hair that often needs longer styling time. It’s worth mention right from the start. A fast heat monitoring safety circuit coupled with a fast material like titanium or better is ideal for thick hair.

Temperature Controls:

Thick hair often requires higher temperatures to straighten effectively. Having a flat iron with adjustable temperature controls allows for customized styling, ensuring optimal results without unnecessary damage.

Negative Ions:

Negative ions help reduce frizz, increase shine, by reducing excess moisture on the hair follicle. This technology is especially beneficial for thick hair, which can often appear frizzy due to its volume.

Mechanical Technology:

Flat irons like the Dyson have introduced game-changing flex plates that contour around your hair, ensuring every strand gets equal attention. Vibrating plates from Bio Ionic 10x aid in the even distribution of heat, making the straightening process faster and more efficient. Mechanical technologies can help with the hair straightening process, some times even more than the flat plate itself.

Overall, It’s the System That Matters, Not Individual Elements:

While each of these technologies plays a role in the efficacy of a flat iron, what truly makes a difference is how they all come together. A great flat iron is one where these technologies complement each other, providing a harmonious straightening experience.

Best Hair Straightener Brands:

  • Bio Ionic: Renowned for their advanced material technology, they boast some of the fastest tools on the market.
  • Dyson: A leader in innovation, their game-changing flex plates have redefined hair straightening.
  • GHD: Simplified process, hair safety, and an elegant design make them a top choice for many.
  • Conair: Known for exceptional value, with brands like Revlon and Remington right on their heels.
  • Babyliss and Hot Tools: These are the pros’ choices. They prioritize quality, even if it means less emphasis on fancy features.

Bio Ionic 10X Flat Iron: Fastest Flat Iron


Bio Ionic 10X Flat Iron is a popular hair straightener known for its salon-quality results and features that make it especially suitable for various hair types, including thick hair. Here’s a more detailed look:

  1. Vibrating Plates: One of the unique features of this flat iron is its vibrating plates, which help to shuffle hair for faster and more effective straightening.
  2. Volcanic Minerals: The plates are infused with a blend of volcanic minerals which emit natural negative ions that drive tiny water molecules deep into the hair. This helps to keep hair hydrated, reducing damage and leaving hair shiny.
  3. Temperature Control: With adjustable temperature settings that can go up to 450°F (232°C), it caters to different hair types and conditions, ensuring efficient straightening without causing undue damage.
  4. Rapid Heating: The iron heats up quickly, which is excellent for those in a hurry. The consistent heat also ensures that thick hair is straightened evenly.
  5. Ergonomic Design: Lightweight and with a comfortable grip, it’s designed for prolonged use without causing strain.
  6. Long Swivel Cord: The longer cord allows for more flexibility while styling, making it easier to reach all sections of hair.


The crown jewel of the Bio Ionic 10X Flat Iron has to be its vibrating plates, which is especially crucial for those seeking the “Best Flat Iron for thick hair”. This ingenious feature ensures that every single hair strand intimately meets the plate, eliminating the risk of uneven styling. Think of it as a meticulous stylist making sure no strand goes unnoticed or untreated – we don’t want any hair feeling left out! Another brilliant touch is the volcanic mineral complex, which releases a bounty of negative ions. These ions expertly combat excess moisture on the hair cuticles, ensuring an optimal moisture balance. Once achieved, the cuticles seal, gifting your hair with a luminous shine. The inclusion of digital controls is a boon, allowing users to precisely dial in the ideal temperature tailored to their hair’s unique needs.

Bio Ionic is a true one pass flat iron. To this day it is the fastest iron on the market – the only other that rivals it is Bio Ionic Graphene MX. This makes it one of the best hair straightens for thick hair, period. But there is more, this iron is not just for straightening; it’s also a champion when it comes to curling hair, making it a multifaceted tool in your beauty arsenal.

Bio Ionic 10X Hair Straightener Review


While the Bio Ionic 10X Flat Iron often tops the list when seeking the “Best Flat Iron for thick hair,” it’s not without its drawbacks. First and foremost, its premium price point might be a deterrent for some. You’re investing in quality, but for those on a tighter budget, it can feel like a significant outlay. Additionally, in a rapidly advancing tech world, it feels overdue for a refresh. Contemporary features like an integrated ion generator could elevate its performance, ensuring even shinier and smoother results. A quicker safety circuit would also be a welcome addition, enhancing its safety profile. In the evolving realm of hair tools, staying updated with the latest advancements is key, and it feels like this iron is due for some modern enhancements.

Dyson Corrale – Best Results Flat Iron (even for thick hair)

dyson corrale

Dyson Corrale™ is a hair straightener developed by Dyson, a brand primarily known for its innovative vacuum cleaners, fans, and hair dryers. The Dyson Corrale™ garnered attention in the beauty industry for several standout features:

  1. Flexing Plates: Unlike traditional flat irons which have solid plates, the Dyson Corrale™ features patented flexing plates that shape around hair. This means they can capture and style more hair with each pass, reducing the need for multiple passes and thereby reducing potential damage.
  2. Cordless Design: One of the standout features is its cordless functionality. It comes with a 4-cell lithium-ion battery, providing up to 30 minutes of cord-free styling. This offers increased flexibility and ease of use, especially for on-the-go touch-ups.
  3. Temperature Control: The Corrale™ offers precise temperature settings, with three heat levels (330°F, 365°F, and 410°F). This ensures optimal styling for different hair types without excessive heat.
  4. OLED Display: The built-in OLED screen displays the battery level, temperature control, and charging status, adding a touch of modern tech flair.
  5. Safety Features: The straightener has a flight-ready feature, allowing you to disconnect the battery for travel. It also has a safety lock and shuts off automatically after 10 minutes of inactivity.
  6. Charging: While the cordless feature is handy, if you’re styling for an extended period, you can also use it corded. It takes approximately 70 minutes for a full charge, but a quick 40-minute charge will give you 90% battery life.


When it comes to hunting down the “Best Flat Iron for thick hair”, the Dyson Corrale™ undoubtedly makes a strong case. Its signature flexing plates are not just a fancy feature; they genuinely enhance performance, ensuring hair is styled evenly with fewer passes, leading to visibly superior results. I have not seen a flat iron with better results. Another of its standout features is its cordless design. In the realm of hair straighteners, this might be the only cordless flat iron that not only promises but delivers efficiency and ease. Pair this with its safety heat monitoring circuit, and you have a tool that’s both safe and adept, especially given how quickly its plates transfer heat. Efficiency is the name of the game here. Those rapid-heating plates (manganese copper alloy), combined with its design, ensure optimal styling even with limited battery power.

And speaking of design, the Corrale™ screams technological advancement — and it’s not just about looks. From the satisfyingly soft sounds it emits during operation to the intuitively placed buttons, every element feels thoughtfully designed, making the styling process feel more like a luxury experience.


Dyson Corrale does come with its share of drawbacks. At the forefront is the battery life. Despite its innovative design, it’s evident that battery technology is still playing catch-up, often leaving users longing for a bit more power between charges. Then there’s the surprising limitation in temperature settings. For a device that radiates advanced tech, this oversight is perplexing. What gives, Dyson? In hand, the Corrale™ does feel a tad on the heavy side, which can be cumbersome during prolonged styling sessions. And we can’t tiptoe around the elephant in the room – that hefty price tag. It’s undeniably a splurge, and while it does deliver impressive results, one has to ponder: is it genuinely worth the investment? Ultimately, that’s a question only your wallet and hairstyling priorities can answer.

Conair Infiniti Pro Rainbow Titanium 1” Flat Iron – Best Drugstore Flat Iron for Thick Hair

Conair Infiniti Pro hair straightener

Conair’s Infiniti Pro Rainbow Titanium 1” Flat Iron is a fusion of aesthetics and efficiency. A distinctive hallmark of this flat iron is its rainbow titanium plates, which not only add a splash of color to your styling routine but also boast superior heat conductivity. This ensures the heat penetrates hair from within, yielding fast, impeccable, and silky straight results.

Top Benefits:

  • Performance That Speaks: With its promise of delivering 89% straighter results, this tool ensures your hair stays smooth and significantly less frizzy.
  • Silky Results with Every Glide: The Rainbow Titanium Plates have been meticulously designed to glide seamlessly over your hair. The result? A polished, frizz-free finish that feels as good as it looks.
  • Rapid Styling: Equipped with extra-long plates, the iron ensures a quicker styling process, making it ideal for those rushed mornings or last-minute plans.
  • Heat for Every Hair Type: Whatever your hair’s texture or thickness, this flat iron has you covered. With 30 diverse heat settings peaking at a scorching 455°F, you’re empowered to choose the optimal temperature for your specific hair type.
  • Instant Heat, Consistent Performance: The true ceramic heater is outstanding, heating up in a swift 15 seconds. But it doesn’t stop there; it also consistently maintains the desired heat level, ensuring an even styling experience from start to finish.

In a market teeming with hair tools, the Conair Infiniti Pro Rainbow Titanium 1” Flat Iron stands out, not just for its vibrant design but also for its unparalleled performance. Whether you’re a professional or someone just looking for a reliable home-styling tool, this flat iron promises results that shine.


When on the hunt for the “Best Flat Iron for thick hair”, the Conair Infiniti Pro Rainbow Titanium 1” Flat Iron often garners attention, and for good reason. Its extra-long titanium plates are a standout, ensuring even heat distribution and optimal hair contact for a smoother glide. This flat iron is a boon for those in a hurry, boasting a swift heat-up time. Users can anticipate a glossy shine after styling and commendable frizz control when straightening. Furthermore, this tool isn’t just about straightening; its versatility shines through its proficiency in curling hair without any tugging or discomfort.


However, it’s not without its nuances. The flat iron leans more traditional with its absence of digital controls, leaving users without the precision and clarity of exact temperature readings. This ambiguity can be a tad unsettling for those who are meticulous about their heat settings. Another area of contention is the slight possibility of hair snagging at the plate ends, a hiccup in an otherwise seamless process. Additionally, while it excels in straightening, there’s room for improvement in the curling department, with some users noting the occasional frizz post-curling.

All in all, the Conair Infiniti Pro Rainbow Titanium 1” Flat Iron, with its impressive list of pros and a few areas for enhancement, firmly cements its place in conversations around the “Best Flat Iron for thick hair”.

Neuro Halo Titanium Flat Iron – Best Safest Flat Iron for Thick Hair

Neuro Halo Flat Iron

Neuro® Halo Titanium Flat Iron is a professional-grade styling tool. It’s one of the products under the Neuro range by Paul Mitchell, a renowned brand in the hair care industry. Here’s a brief overview:

Neuro® Halo Titanium Flat Iron:

  1. Titanium Plates: The flat iron features titanium plates, which are known for their quick heat-up times and even heat distribution. Titanium is also durable, making it perfect for consistent, long-term use.
  2. Digital Features: One of the highlights of the Neuro Halo line is the incorporation of advanced digital features. The flat iron often comes with a touchscreen display for easy temperature control and adjustment.
  3. Heats Up Quickly: Titanium’s excellent heat conductivity means the iron heats up quickly, allowing for swift styling, especially beneficial for those on-the-go.
  4. Temperature Controls: The iron offers customizable temperature settings, which is essential for catering to different hair types and avoiding heat damage.
  5. Ergonomic Design: Designed for professional use, it often boasts an ergonomic design to reduce hand fatigue, especially during prolonged styling sessions.
  6. SmartSense Microchip: Some models of the Neuro Halo come equipped with the SmartSense microchip, which ensures the temperature remains consistent during styling.

The Neuro® Halo Titanium Flat Iron is appreciated by many professionals for its advanced features and durable construction, making it suitable for achieving various hairstyles with precision.


Neuro® Halo Titanium Flat Iron undoubtedly made a great flat iron. One of its standout features is the genuine full titanium plates – not just a mere coating. This ensures rapid heat-up times, consistent heat distribution, and longevity, setting it apart from many competitors. The incorporation of digital controls provides a seamless styling experience, allowing users to adjust and monitor temperatures with precision. Safety is paramount, and the integrated safety circuit is a testament to that, ensuring peace of mind during each styling session. Aesthetically, its sleek design isn’t just pleasing to the eye; it’s an embodiment of modern hair tool engineering. Furthermore, while it’s an outstanding choice for thick hair, it doesn’t discriminate – even those with fine hair will find it a perfect ally in achieving salon-worthy results.


The most noticeable omission is the lack of negative ions technology. Negative ions play a pivotal role in taming frizz, enhancing shine, and ensuring optimal moisture balance in the hair. For those with thick hair, this technology can be especially beneficial in achieving a smooth and polished finish. While the flat iron excels in many areas, integrating negative ions technology would undoubtedly make it an even more formidable contender in the world of hair styling tools.

Hot Tools Black Gold Evolve Flat Iron – New Kid with a lot of promise

Hot Tools Black Gold Flat Iron

When you think of versatility, precision, and professional results, the Hot Tools Pro Artist Black Gold Evolve Ionic Salon Flat Iron undoubtedly comes to mind. Whether you’re aiming for pin-straight hair, beachy waves, or soft curls, this tool has been designed to deliver.

1. Advanced Surface and Ion Technology:
At the heart of its stellar performance is the proprietary Black Gold styling surface. This unique blend, when combined with an advanced ion generator, not only ensures efficient styling but also imparts a dazzling shine to your hair, making every day a good hair day.

2. Precision Temperature Controls:
Navigating the right heat setting is a breeze, thanks to its smart temperature features. With an intuitive rotating dial and a clear digital LED display, you can always be sure you’re using the ideal heat for your hair type. And for those of us who tend to be forgetful? The flat iron emits an audible tone once your desired temperature is achieved. Plus, it recalls your last used setting—no need to reset each time!

3. Ceramic-Titanium Plates:
The fusion of ceramic and titanium in its plates ensures that you get consistent heat, reducing the chances of hair damage. Whether you’re crafting a sleek look or embracing your inner beach goddess with wavy tresses, these plates promise longevity and pro-level finesse.


The Hot Tools Pro Artist Black Gold Evolve Ionic Salon Hair Flat Iron truly stands out in a saturated market, and there are several reasons we’re smitten. First off, its aesthetics are simply on point; the look is sleek and radiates professional quality. The temperature controls are a dream, offering precision and ease. Add to this the memory feature which recalls your last used setting, and it feels like this flat iron truly knows you. When it comes to thick hair, the titanium-coated ceramic plates are game-changers, providing consistent heat and smooth glides. But the real magic lies in the negative ion generator. For those with thick hair, this feature is a godsend, ensuring less frizz and more shine. And let’s face it, in the realm of flat irons, Hot Tools has truly outdone themselves this time, crafting an innovative and exciting tool that not only meets but exceeds expectations.


While the Hot Tools Pro Artist Black Gold Evolve Ionic Salon Hair Flat Iron brings an array of impressive features to the table, there are certain aspects to consider. Firstly, given its novelty, the flat iron still needs to stand the test of time. Many tools shine initially but falter in the long run, so its durability and consistency over extended use remain to be seen. Additionally, for a tool that boasts advanced features, the absence of an advanced heat monitoring circuit is noticeable. Such a feature would have provided users with added assurance of consistent heat distribution and reduced risks of potential heat damage. These areas of improvement would certainly take this already promising tool a step closer to perfection.

Conclusion – what is the best flat iron for thick hair?

In our comprehensive quest to identify the “Best Flat Iron for thick hair”, numerous brands were meticulously evaluated. Everything from Remington to Hot Tools, from the stylings of Kristen Ess to the revered technology of GHD and T3, was placed under the microscope. While each of these brands brings unique attributes to the table, unfortunately, they didn’t make the final cut for our list. This underscores the stringent criteria we made for this list. As always, it’s vital for every individual to assess their specific needs and make informed decisions based on what’s best for their hair type and desired results.

Edited by Milabu

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