A
heat protectant spray is the kind of thing you just trust to help your hair and to work.
Every stylist insists
you need one, and they should know, they are stylists, right? They would not lie to you.
Still, how do such products actually work, and how can you tell if heat protectant sprays are really doing their job?
It is easy to take their promise at face value, especially when they are treated as a must-have by professionals, but that does not really explain what they are doing once they are on your hair.
If you want to know whether they are working, the proof is in the pudding, and the pudding, in this case, is the ingredients.
Looking at what is inside the formula is the clearest way to understand how a heat protectant spray is meant to help and why people put so much faith in it in the first place.

Common Ingredients in Heat Protectant Sprays
Numerous ingredients are meant to
protect the hair from heat, but how do they work? Let’s go through a few common ones.
PVP/DMAPA acrylates copolymer: This ingredient both coats the hair shaft and binds to the
damaged areas of the hair, creating a protective shield against further damage. Because it doesn’t simply coat the hair, this ingredient is considered more effective at maintaining the health of the hair.
Hydrolysed wheat protein: Hair is about 91% protein. Using
hot tools on the hair breaks down the chemical makeup of the hair and destroys those proteins, causing
breakage,
split ends, and
flyaways. Hydrolysed wheat protein helps the hair maintain and rebuild its protein makeup during
heat styling.
Sodium bisulphate: This ingredient acts as an antioxidant, meaning it limits oxidation, which
prevents the hair from burning. Sodium bisulphate has been shown to be less effective than the above two items in
preventing damage but is still a great ingredient to have in a heat protective formula.
Silicones: Silicones coat the hair shaft to prevent
heat damage. While effective, silicone-based products can
build up, which makes them somewhat less desirable as heat protectants. However, silicones are great for smoothing and locking in moisture, so they’re still super-beneficial in their own right.

As with many beauty products, heat protectant formulas often contain more than one key ingredient. This doesn’t mean that single-ingredient products are any more or less effective.
The overall function of most of these ingredients is to coat the hair to some degree. Most, if not all, have been proven to protect the hair effectively from heat styling damage. Some hair responds to different combinations. You just need to find the perfect one for you!
MoroccanOil Heat Styling Protection and
Evo Icon Welder Hot Tool Shaper are great examples of effective, smoothing, and nourishing heat styling sprays. Both provide hydration, health, and most importantly, protection to the hair. So next time before you turn on your
hot tools ready to
straighten or
curl remember to comb through a heat protectant.
Millie from our Customer Service team shares the Top 10 Hair Straighteners
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