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Most popular hair serums at Sephora for $25-$30 This nourishing serum works as a protectant for heat styling.—Bestreviews, Mercury News, 14 Apr. 2026 The brand’s Glossing Detangler has a fan club of its own (more than 2,000 people bought this treatment in the past month alone), thanks to its shine-boosting, softening, and heat-protectant formula.—Annie Blackman, InStyle, 8 Apr. 2026 The collection includes a heat-protectant mist, styling glaze, volumizing mousse, hairspray, wrapping foam, strong-hold gel, and an edge brush.—Allure Editors, Allure, 25 Mar. 2026 Always use a heat protectant before styling your hair.—Danielle Sinay, Glamour, 23 Mar. 2026 See All Example Sentences for protectant