I'm obsessed with this double-duty heat protectant spray — and it's now $18 at Amazon

Izabella Zaydenberg
·Deputy Editor, Commerce
·6 min read

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Your hair will thank you. (Photo: Amazon)
Your hair will thank you. (Photo: Amazon)

I've been varying degrees of bleach blonde for over a decade now, so keeping my hair healthy — especially after years of highlights, double processes and toner — is a big beauty priority. Plus, as any long-time blonde will tell you, you need to take extra precautions when you heat-style your hair. After all, you wouldn't hit the beach without applying your sunscreen, so why should your hair be any different?

Here's my hair secret: HSI Professional Heat Hair Protectant and Conditioner has been a beauty staple of mine for the better part of my fair-haired journey. Sure, it may not be much of a secret — over 27,000 Amazon shoppers gave it their five-star stamp of approval — but I've been going through bottle after bottle of the stuff for years. I'm already on my fifth one! And now it's on sale for just $18 (was $20).

The deal's even sweeter, including free shipping, if you're an Amazon Prime member, too. Not yet a member? No problem. You can sign up for your free 30-day trial here. (And by the way, those without Prime still get free shipping on orders of $25 or more.)

$18 $20 at Amazon

It protects while conditioning and infusing moisture and shine. (Photo: Amazon)
It protects while conditioning and infusing moisture and shine. (Photo: Amazon)

What makes the spray so magical isn't just its heat-protectant properties (though it does keep your locks safe at up to 450 degrees); it's also a leave-in conditioner. Argan oil coats each strand, leaving it frizz-free, shiny and hydrated. No dry, brittle ends here! It's more of a serum formula than an oil, so it won't weigh down your look, either. I coat my hair in the stuff before each blowout, and my roots never look greasy or like I skipped a wash day. It's also safe for color- or chemically treated hair, and can even be used on extensions.

"I’ve tried a lot of heat protectors and straighteners, but this is the best one yet," a shopper noted. "It doesn’t make my hair difficult to brush or sticky, like many of them. My hair is so soft and conditioned and straightened very easily. I don’t even think it’s meant to be a straightening product, but when you have thick curly hair, it still makes the process sooo much easier."

Another reviewer compared it to her go-to salon look: "I wish I could give this spray 10 stars because it is amazing!" she shared. "I have very, very thick, wavy, frizzy, unmanageable hair and this tames it, makes it so, so, so soft and [has] cut my time straightening way down. Whenever I leave the salon, my hair feels amazing and soft, but I have never been able to achieve the same look and feel at home. This HSI spray gives me that exact same salon feel."

$18 $20 at Amazon

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