best hair straightening serums

9 Best Hair Straightening Serum In 2022 | Products For Smooth, Silky Hair

If you want that ultra-sleek, smooth look without damaging your hair, it’s best to use the best hair straightening serum along with your styling tools.

Changing your hair texture from wavy or curly to straight requires some heat products to be used. Maybe a hair dryer or even a flat iron in the case of the curly-haired folks. 

But using these for longer times can ultimately hurt your hair, and the smoothness might not last for longer too.

Related: Best shampoo for straight hair

Related: How to plop straight hair

Related: How to straighten frizzy hair

A hair straightening serum or cream is the perfect solution to these problems. 

And if you’re wondering which is the best hair straightening serum to buy, don’t worry. Just check out the list of products and pick one that’s best suited to your tresses.

Here are some of our favorite products to keep hair straight after straightening it. 

Hair SerumBest ForChief Ingredients
SheaMoisture Daily Hydration Finishing Oil SerumAfrican American HairCoconut Oil, Shea Butter, Sweet Almond Oil, Argan Oil
OGX Smoothing + Liquid Pearl Luminescent SerumFrizzy Hair
Castor Oil, Kelp Extracts, Pearl Extracts
John Frieda Frizz Ease 3-Day Straight Flat Iron SprayOily HairWater, Hydrolyzed Keratin, Malic Acid
Tigi Bed Head Straighten Out Straightening CreamDry HairWater, PVM/MA Copolymer, Guar, Glycerin
Matrix Biolage Smoothing Hair SerumDamaged HairCamellia Kissi Seed Oil, Dimethicone
Kerastase Discipline Smoothing Taming MilkThick HairWater, Arginine, Hydrolyzed Wheat Protein
The Body Shop Grapeseed Glossing SerumFlyaway ControlGrape Seed Oil, Sesame Seed Oil

Top Hair Straightening Serum 2021

SheaMoisture 100% Virgin Coconut Oil Daily Hydration Finishing Oil Serum

Best Hair Straightening Serum For Curly Hair

hair straightening products for black hair

The first name on our list of the best hair straightening serum is the Shea Moisture Coconut Oil Serum.

We think it’s one of the best straightening products for black hair. As curly African American hair is finer, coarser, and more prone to heat-related damage, this finishing oil serum is just the thing to keep it protected.

As the name suggests, the top ingredient in this leave-in serum is coconut oil, which has long been considered the Black girl’s best friend due to its nourishing properties.

Then there’s also Acacia Senegal and coconut milk that detangle your curls, reduce frizz, and leave it straight and smooth for long.

The best part about this serum is that it’s free of any harmful chemicals like petrolatum, drying alcohol, parabens, or phthalates. It doesn’t even contain silicone that is known to weigh down your tresses. 

OGX Smoothing + Liquid Pearl Luminescent Serum

Best Smoothing Serum For Frizzy Hair

best smoothing serum for frizzy hair

Isn’t it irritating when after such careful flat ironing or blow-drying, your hair is left frizzy and unmanageable by the end of the day?

If this is your story, we think you should try out the OGX Smoothing + Liquid Pearl Luminescent Serum.

The formulation contains sea kelp extracts that protect your tresses and pearl extracts that give a glass-like shine.

Remember the sheen your favorite highlighter leaves on your skin? This OGX hair serum does something similar for your hair. 

But the main reason why this product is on your best hair straightening serum is the price tag.

It’s super affordable! So you can get silky, smooth hair at drugstore prices. 

Related: Check out our favorite OGX shampoos for soft, nourished hair on a budget

John Frieda Frizz Ease 3-Day Straight Flat Iron Spray

Best Hair Straightening Serum Spray

best hair straightening serum spray

Okay, okay, we confess. This is technically not a hair serum but a spray. But the John Frieda Frizz Ease was too good not to include in our best hair straightening serum list.

It’s, in our opinion, among the must-have products to keep hair straight after straightening it.

It promises to keep your tresses straight for at least 3 days after your blow-drying or flat ironing treatment.

That is if you don’t shampoo your hair first. We also liked the keratin-based formula that adds strength and shines back to heat-damaged strands. 

The beauty of the John Frieda hair serum spray is that despite its long-lasting formula, it doesn’t weigh down your tresses. So if you’ve got really fine hair, you should go for this product. 

Tigi Bed Head Straighten Out Straightening Cream

Best Hair Straightening Cream

best hair serum for damaged hair

Sometimes hair needs a little bit of extra TLC, especially if they’re dry, to begin with. So if your tresses feel straw-like after straightening, try using a hair straightening cream instead of a serum.

And the Tigi Bed Head Straighten Out is perfect for the job!

The formula is packed with emollients like glycerin that nourish each strand, leaving hair soft and silky.

This cream contains thermosetting polymers that get activated after you apply heat in the form of a flat iron or blow dryer.

So all you need to do is apply this cream to damp hair and straighten your tresses. It leaves your hair looking straight, smooth, and more manageable. 

Oh, and don’t forget, this is a heat-activated cream. It was formulated to be used with a heat-styling.

If you let your tresses air dry after using this straightening cream, it might harden in your hair. 

Related: Try these best styling gel for black womens hair to keep curly, Afro hair looking good!

Matrix Biolage Smoothing Hair Serum

Best Hair Serum For Damaged Hair

matrix biolage smoothing hair serum

Constant hair styling and straightening can leave it damaged. So the best hair straightening serum shouldn’t just keep your tresses smooth for longer, but it also must protect them.

And this is exactly what the Matrix Biolage Smoothing serum does. 

It contains a rich blend of botanicals, including Camellia Kissi seed oil that protect your hair from heat-related damage.

Most users also loved the fragrance that the serum leaves behind in the hair. The formulation is lightweight, so it doesn’t weigh the hair down.

But a little product goes a long way in this case. So be careful not to use too much serum as it can leave your tresses looking greasy and oily. 

Kerastase Discipline Keratine Thermique Smoothing Taming Milk 

Best Hair Straightening Serum For Thick Hair

hair products for straight thick hair

A lot of people hate straightening using flat irons or blow dryers because of the time it takes.

And this is worse if you’ve got really thick hair. But not to worry, the Kerastase Smoothing Taming Milk makes everything better.

This formulation contains a mix of ceramides and keratin. It coats every strand before you get to straightening and makes the process much easier.

And the best part is that it works amazingly well at combating frizz and dryness too. 

Streax Pro Hair Straightening Cream

Best Temporary Hair Straightening Cream

streax pro hair straightening cream

When we say “best hair straightening serum” or even “hair-smoothing cream” you usually think of products that increase the longevity of already straightened hair.

Or something that protects your tresses in the straightening process. But what if there was a cream that left your tresses silky straight without any heat styling tools involved?

The Streax Pro Hair Straightening Cream does just that. Apply it to your hair to temporarily feel your tresses become smooth and straight.

It’s one of the top men’s hair straightening products too. So anyone can use it! 

We would advise you not to use it often because it can dry out your hair. And steer clear of your scalp while applying this product as it is a chemical-based straightener. 

The Body Shop Grapeseed Glossing Serum

Best Silicone-based Hair Serum

best hair serum after straightening

The Body Shop Grapeseed Glossing Serum is the perfect choice if you’re looking for something to add shine and gloss to your tresses.

It contains grape seed oil and sesame seed oil that adds nourishment to the strands and prevents frizz.

This hair serum is one of the best products to keep hair straight in humidity. It contains silicones that add that extra layer of glass-like sheen to your tresses.

Now most products avoid silicones as it builds up on your hair. But this Body Shop serum washes off easily, and if you can always use a clarifying shampoo once a week to get rid of any product build-up.

Wella Wellastrate Intense Straightening Cream

wellastrate intense straightening cream

Most straightening serums preserve the texture of already straightened hair. They increase the longevity of your straight textured-tresses and prevent frizz.

But this product by Wella actually transforms curly hair into a straight, sleek mane.

It’s dermatologically-tested and contains a cationic base that helps adds moisture to your tresses and make them silky smooth.

Which serum is best for straightening hair?

After testing the products and testing them on parameters like ingredients, frizz control, shine, etc. we’ve found the Tigi Bed Head Straighten Out to the best hair straightening serum.

The Tigi Bed Head Straighten Out Serum is the best serum for straightening hair. Its emollient and keratin-rich formula helps keep frizz at bay and leaves hair’s texture soft and smooth. It’s also great for all hair types including curly and African American hair.

How do I keep my hair straight overnight?

Sometimes you just get tired of straightening your tresses every day. Won’t it be amazing if the current smoothness of your hair lasts for days?

Don’t worry this is possible! Try these tips to keep your hair straight overnight. 

  • Use a hair serum or spray: The easiest way to make straight hair last for longer is to spritz on a hair spray or serum. Some of these products like the John Frieda Hair Spray or Tigi Bed Head Straighten Out Serum protects your hair from humidity and prevent it from getting frizzy or curly again. 
  • Change the bedsheets: Try replacing your cotton bed sheets with silken ones. Cotton fabrics are naturally absorbent and can take away all the natural moisture from your tresses. This increases the chances of hair becoming frizzy. The fibers on cotton pillowcases can also snag and tear your strands. So switch from cotton to silk or satin beddings.
  • Pin or tie your hair before bed: Tying your hair back or pinning them up keeps them from bouncing up and down and getting tangled. It reduces friction between the strands, which in turn reduces frizz. Just remember to keep not tie your hair too tightly as it can cause a kink in the middle.

Is putting oil in hair before straightening bad?

No, we don’t recommend using oil before straightening your tresses, especially if you’re using a flat iron.

The heat from the flat iron or blow dryer increases the temperature of your tresses. This heats the oil too and essentially deep-fries your hair.

So avoid coconut oil, olive oil, or other hair oils before straightening. 

If you’re worried about dryness or damage, try using the best hair serum before straightening.

Some of these products are listed above. They help retain moisture in your tresses and also shield them against heat-related damage. 

Why does my hair not stay straight after I straighten it?

Dryness and damage is often the reason why your hair does not stay straight even after you straighten it using a flat iron. The cuticles of the hair shaft get exposed, leading to frizz.

Also, if you live in a high humidity area, it too can lead to frizz. The build-up of static due to using plastic combs, etc. is another reason why your hair doesn’t stay straight after you straighten it.

Everyone loves straightening experimenting with their hair. But if you want your styles to last longer and hair to be protected, it’s essential to use the best hair straightening serum.

We’ve compiled this list based on several factors, including ingredients, price, and your hair’s needs.

Choose one to keep your newly-straightened tresses soft and smooth all day long. 

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