Which product is commonly applied to protect hair during the heat styling process?

The correct choice, which is heat protectant spray, is specifically designed to provide a protective barrier for the hair when exposed to high temperatures associated with styling tools such as curling irons, flat irons, and blow dryers. These sprays often contain ingredients that help to minimize damage by sealing the hair cuticle and preventing moisture loss, which can lead to dryness and brittleness. Using a heat protectant is considered an essential practice among hairstylists and is an important step in maintaining the health and integrity of the hair during styling.

Other types of products, like gels and conditioners, serve different purposes. Gels are typically used for styling and holding the hair in a specific shape or style, while conditioners focus on hydrating and nourishing the hair. Hair serums may provide shine and reduce frizz but do not provide the same level of thermal protection as specifically formulated heat protectant sprays. Therefore, while these other products can contribute to overall hair health and appearance, heat protectant spray is uniquely suited for protecting hair from heat damage during the styling process.