The Best Heat Protectant Sprays for Wet and Dry Hair

I spent months testing dozens of heat protectants for hair. Whether you’re blow-drying, curling, or straightening, these are the best formulas I’ve found.

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Featured in this article

Best Overall

Bumble and Bumble Hairdresser's Invisible Oil Heat/UV Protective Primer
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Best on Dry Hair

Oribe Gold Lust Dry Heat Protectant Spray
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Best on Dry Hair Runner-Up

Hot Tools Pro Artist Heat Lacquer Seal Thermal Activated Hi-Shine Spray
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Best on Damp Hair

Drybar Prep Rally Prime & Prep Detangler
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Other Heat Protectants We Tried

Photograph: Kat Merck

R+Co Bleu Hypersonic Heat Styling Mist for $36: This high-tech-looking aerosol in a recycled aluminum bottle was a favorite during the early weeks of testing—I liked its protection up to 450 degrees Fahrenheit and its frizz-fighting properties. However, it does use a polymer and resin complex to smooth hair, and over time I noticed it was leaving a sticky residue on my hands and heat tools.

Pureology Instant Levitation Mist for $32: Pureology is known for its formulas made specifically for color-treated hair, so I was hoping this would be a great-performing solution for those who don't want to risk ruining their expensive highlights or balayage. However, it seemed to leave a dull residue, and neither I nor my short-haired tester found the volumizing feature to be very effective.

Photograph: Kat Merck

Biolage Thermal Setting Spray for $23: I like the Biolage brand, and the fact that this can be used on either damp or dry hair (though it doesn't give a temperature limit). However, whether I used it wet or dry, I found it left parts of my hair stiff. Some online reviewers, though, found they quite liked it for setting curls.

Photograph: Kat Merck

Briogeo Farewell Frizz Blowdry Perfection & Heat Protectant Creme for $26: I have thick, unruly hair, and this cream protectant felt like it actually made my hair unmanageable and harder to style. It may speak to its effectiveness, but I felt like I had to take too many passes with a titanium flat iron turned up to max temperature.

IGK Good Behavior Spirulina Protein Smoothing Spray for $34: This aerosol felt like it dried my hair out a bit, and it has the same unpleasant scent as the 4-in-1 (above). I didn't care for it in a liquid spray, but it was overwhelming in aerosol cloud form.

Reverie Milk Anti-Frizz Leave-in Nourishing Treatment for $44: I loved this cream's spicy botanical scent, stylish glass bottle, and the fact that it protects up to 450 degrees Fahrenheit (according to Reverie; it does not say so on the bottle). It worked OK, but unfortunately, there are just too many better options for half the price.

Sutra Heat Guard Heat Protector for $18: Imperceptibly scented and light, this pump spray seemed promising for use on dry hair, but it had the same issue as Briogeo's Farewell Frizz. Even after multiple passes at high temperatures, my hair was unmanageable and would not cooperate with the flat iron.

Chi 44 Iron Guard for $19: This drugstore stalwart works well to protect from heat while also tamping down frizz, and the new Botanical Bliss scent is an improvement over the original formula's. However, it left a sticky residue on my hands and heat tools.

Sutra Heat Guard Blowout Cream for $24: I love Sutra’s IR2 hair straightener, so I had high hopes. This thick and almost fragrance-free cream is meant to protect up to 450 degrees Fahrenheit and reduce drying time, but my hair felt dried out after use.

Milk_Shake Lifestyling Thermo-Protector for $19: I usually love Milk_Shake products, but this aerosol spray felt like it dried out my hair and amplified my already hard-to-handle frizz after blow-drying. It also did not add a discernible amount of shine as promised.

FoxyBae Cool AF Heat Protectant + Biotin for $16: I like the cheery design of this pump spray bottle, as well as the fact it can be used on wet or dry hair. However, it didn’t seem as effective as other brands and was greasy when used on dry hair.

R+Co Chainmail Thermal Protection Styling Spray for $36: I appreciated this spray for its ability to add lots of visible shine, but the aerosol nozzle was not as targeted as I’d have liked, creating such a wide-ranging, fine-mist fog that it was nearly impossible not to breathe it in. I also found the cologne-like scent overwhelming.

FAQs

How Do Heat Protectants Work?

Ingredients vary, but most heat protectants work much the same way: by deploying ingredients like copolymers or silicone that coat the hair shaft to slow (though not totally stop) heat conduction. Many heat protectants also include moisturizers to help seal and smooth the cuticle to reduce frizz. Because heat protectants can only slow, not completely stop, heat damage, it's still important to use the lowest heat settings you can for your hair for the least amount of time.

How Do We Test?

I wash my 3a curly hair twice a week, then blow-dry and follow up with a straightening iron. I touch up my hair with a straightening iron daily in between. I tested the heat protectants in this guide in the course of my normal day-to-day life over a period of four months. I used each product on either damp hair before blow-drying or on dry hair before the straightening iron—whichever was indicated by the instructions. If a product could be used on damp and dry hair, I tried it both ways.

What's Up Next to Test?

I'll be testing Tresemme's Protecting Heat Keratin Smooth Spray, Redken's Quick Blowout, and products from R+Co Bleu, Emi Jay, and Cloud 9.


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