5 Best Heat Protectants for Relaxed Hair to Buy in 2021

Relaxed hair is sleek and shiny when it’s first styled and takes work to keep fresh. Adding condition and protecting hair from heat are essential to long-lasting relaxed hair.

That’s why we’re here to help you find the best heat protectant for relaxed hair to keep your locks safe while you create chic and sleek styles.

Picking Heat Protectants for Relaxed Hair

moroccanoil heat protectant for relaxed hair

When searching for a heat protectant for your hair, there are a few things to look out for. These include:


Most heat protectants come with either Cyclomethicone or dimethicone. These are types of silicones that wrap the hair in a protective barrier that is resistant to heat.

Both of these are approved to keep hair safe against heat and generally come accompanied by other ingredients.

Look for those that nourish hair and prevent frizz and humidity from taking over your smooth style and ruining it for the day.


Heat protectants come in all types, including spray, serum, and cream. Depending on your hair type and the desired style, you’ll want to go for a different formula. To choose better for your hair type, try:

  • Spray for Oily Hair
  • Serum for Dry Hair
  • Cream for Damaged Hair

Heat Range

Each heat protectant has a heat range that it can resist. Before trusting that your chosen product can do the trick, check for its heat barriers and only apply heat that it can handle. Ceramic irons are one of the hottest tools we use on our hair, some of which get over 450⁰F.

Top 5 Best Heat Protectants for Relaxed Hair Reviewed

1. MIZANI Protecting Serum – Top Pick!

mizani heat protectant serum

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Coming in as the best heat protectant for relaxed black hair is the MIZANI Thermastrength Serum. As a brand, they’ve gained the reputation as one of the most diverse producers of styling products, coming with a little something for every texture.

In the Thermastrength serum, you’ll find shea butter and innovative anti-breakage technology that contains ceramide. Smoothing this serum on hair before styling helps protect the hair, coating it with protection that can withstand high heats and hold styles all day.

No matter if it’s a blow dryer, flat iron, or crimper, this serum will keep the hair ready, preparing it for whatever comes its way.

mizani hair care and heat protectant products

Mizani is hands down the best manufacturer of products for relaxed hair.

Why we love it:

  • Infused with innovative ingredients;
  • Packed with shea butter for condition and protection;
  • Helps prevent breakage and frizz;
  • Created from MIZANI, a world-renowned brand for all hair textures and types.

What we’d change:

  • The smell could be better.
If you like to apply heat to your hair to change up your style, giving it protection is key. With this serum, you’ll have the perfect combination of condition and protection for damage-free hair.

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2. Paul Mitchell Thermal Spray – Runner Up

Paul Mitchell Hot Off The Press Thermal Protection Spray

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Paul Mitchell is a huge name in the haircare industry, known for their salon-quality products for all hairstyles and types. Their Hot Off The Press thermal protectant is the best heat protectant spray for relaxed hair, filled with rice hull extract that creates a physical barrier to protect against heat and breakage.

It’s got ingredients that protect from humidity and fight frizz. Plus, the smell comes packed with citrus notes that make it a pleasure to use.

For hair of all textures, this thermal spray is the perfect protectant, shielding the hair while creating a flexible and moveable style.

relaxed hair straightened with flat iron and heat protectants

Paul Mitchell Hot Off The Press always provides silky-smooth results.

Why we love it:

  • The smell is scrumptious;
  • Hold is flexible;
  • Protects against heat, humidity, and breakage;
  • Comes with proteins that boost hair’s strength.

What we’d change:

  • The feel is sticky at first, needing time to dry before ironing or drying.
Paul Mitchel products are known around the world, getting a reputation as one of the best haircare lines out there. This protectant spray is another hit, filled with juicy ingredients that protect hair without weighing it down.

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3. Moroccanoil Heat Protector – Premium Pick

Moroccanoil Perfect Defense

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Moroccanoil got its fame from fusing argan oil into its products. Argan is known for its fragrance and protection of the hair and skin, used as a traditional beauty treatment for centuries.

Their Perfect Defense hair oil is powerful, protecting the hair from heat all the way up to 450⁰F. The formula is lightweight and spays right onto hair, creating a shield that prevents damage and allows for any hairstyle.

All you need to do is spritz, wrapping the hair in an aroma of goodness infused with panthenol to strengthen your strands.

heat protectants from paul mitchel and moroccanoil

These two are both awesome products that will protect your hair and provide silky results. But if I had to pick one, I’d go for Moroccanoil. Just love the formula a bit more, and the smell… this smell.

Why we love it:

  • Moroccanoil’s use of argan oil in all of its products;
  • A strong defense against heat and damage;
  • Infused with panthenol that helps strengthen hair.

What we’d change:

  • Goes on a bit sticky when adding to damp hair.
Morroccanoil uses the help of argan oil to create products that are strong and healthy for hair. With this spray, all textures can enjoy any and all styles, knowing that their locks are protected from heat and damage. Plus, the smell is exotic, enhanced with other oils to create a healthy sheen for styled hair.

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4. Joico Heat Protection Crème – Thermal Protectant for Frizzy Hair

Joico Heat Set Blowout Perfecting Crème

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Joico is behind some of the hair industry’s most ground-breaking products. They search far and wide when choosing ingredients for their products, creating a little something for everyone.

With this Blowout Perfecting Cream, you’ll have the perfect sidekick to creating daring styles on your relaxed hair. It’s weightless, fights frizz protects from humidity, and creates a shield over each strand that can withstand high heat.

With help from a patented peptide complex, this formula helps create strong stands and lasting shine for healthy, never over-styled hair that’s worth flipping back and forth.

Why we love it:

  • Advanced formula to protect against damage;
  • Fights frizz and damage;
  • Works with all hair types and textures.

What we’d change:

  • Doesn’t come with herbal ingredients.
Creating bouncy and voluminous locks takes the help of heat. With this Joico Blowout Protecting Cream, you’ll have the perfect formula for creating salon-worthy hair right from home without the worry of damage or over-drying.

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5. Design Essentials Heat Protecting Serum

Design Essentials Professional Grade Silk Essentials Heat Protectant Strengthening Serum For Relaxed & Natural Hair

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Design Essentials is an American-made formula that’s created the perfect line for every type of hair. Their products feature vitamins and minerals that work together to add strength to relaxed hair.

The Silk Essentials Heat Protectant Serum is specifically for relaxed hair, coming with conditioning ingredients that protect and nourish hair. Plus, you’ll find 17 different amino acids that help to strengthen hair, prevent frizz, and keep it from damage, letting you style your hair however you want. Just a few drops go a long way, helping you achieve the hair you’re looking for.

Why we love it:

  • Infused with silk and amino acids that create a barrier around the hair;
  • Provides moisture for relaxed hair;
  • Works with all heating tools, preventing frizz and static all-day.

What we’d change:

  • No specially patented ingredients;
  • The smell isn’t so nice.
For an all-in-one product, this Silk Essentials Heat Protectant Serum is perfect. It keeps hair strong and frizz-free all day long, complimenting each and every style no matter how much heat you have to apply to it.

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How to Use Heat Protectants Correctly

Apart from picking a good formula for your hair, it’s good to know how to use a heat protectant. There are some tricks of the trade that allow the product to absorb better and fully protect strands.

To use your products effectively, try:

  • Using on damp hair;
  • Letting set for at least 15 minutes;
  • Blow drying hair fully and applying again if using a hot iron or curling iron.
  • Applying oil or leave-in onto styles when you’re done.

Also read: Shampoos for Relaxed Hair

Heat Protectant FAQ

flat ironed relaxed hair

Can I heat straighten relaxed hair?

Of course, you can! However, use extra care, spraying it with some heat protectant to keep it from heat or damage.

What if I don’t use heat protectant on relaxed hair?

Without a heat protectant, the hair will be at risk for damage. Relaxed hair needs extra love and could dry out and become brittle without something to keep it safe.

How to make DIY heat protectant for relaxed hair?

There are several DIY heat protectants out there, some of which use household ingredients or foods. The best heat protectant for relaxed African American hair you can make at home is with rice, soaking it in water and draining for a liquid you can spritz on locks.

Also read: Clarifying Shampoos for Curly Hair


Relaxed hair needs all the love it can get, especially when styling with heat. Keep your locks looking luscious and silky with a serum that wraps the strand and keeps it from damage and dryness.

After reading up on our top five picks, it shouldn’t be hard to choose, taking your pick of spray, serum, or cream. As always, for questions or comments, give us a shout. We can’t wait to see your sleek new hairdos!

Ally is a professional hairstylist with more than 6 years of experience, but hair has been her passion since early childhood. Here, at Hair Spies, she blogs about all things hairdressing, hair tools, and everyday hair care.

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