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Description
Ingredients
Product Details
Protect and perfect your hair with Design Essentials STS Express Thermal Therapy Leave-In Sealant, a heat-activated formula designed to seal in moisture, smooth the hair cuticle, and provide a flawless finish when using thermal tools. Whether you're blow-drying, flat ironing, or curling, this professional-grade leave-in enhances the styling process while minimizing damage and maximizing shine.
Formulated with advanced Strengthening Thermal System (STS) technology, this sealant helps guard against heat stress and environmental damage, all while boosting softness and manageability. It works by smoothing the hair surface, reducing frizz, and sealing split ends—leaving your strands with a sleek, silky feel that lasts. Ideal for all hair types, including textured, chemically-treated, and color-treated hair, it supports healthy styling without sacrificing strength or moisture.
Lightweight and non-greasy, this thermal sealant can be used as part of your regular styling routine to maintain polished, frizz-free looks day after day. Free from parabens and safe for all hair types, it’s the perfect companion for achieving salon-level smoothness and protection at home.
Heat-activated sealant that protects hair from thermal damage while delivering long-lasting smoothness and shine.
STS Express formula strengthens and seals the cuticle, locking in moisture and reducing the appearance of split ends and breakage.
Minimizes frizz and improves manageability, making it easier to straighten, curl, or style your hair with less heat exposure.
Lightweight, non-greasy formula ideal for all textures—including natural, relaxed, color-treated, and keratin-treated hair.
Paraben-free and designed for professional results, this leave-in makes heat styling safer, faster, and more effective.
*Ingredients may vary slightly due to formula updates by brands. Please consult packaging for most accurate list of ingredients
Product Recommendations
Frequently Asked Questions
Design Essentials STS Express Thermal Therapy Leave-in Sealant is formulated with a blend of thermal-protective polymers, plant-based conditioning agents, and moisture-sealing emollients. The formula is designed to create a protective barrier against heat styling while nourishing the hair shaft. For a complete ingredient list, please refer to the product packaging or the brand's official website.
Yes, Design Essentials STS Express Thermal Therapy Leave-in Sealant is formulated to be compatible with color-treated hair. The product helps seal the hair cuticle, which can actually help protect color vibrancy by reducing moisture loss and environmental damage. Always perform a strand test if you have concerns, and follow product instructions for best results.
Apply the leave-in sealant to clean, damp hair, focusing on mid-lengths to ends. Use a small amount and distribute evenly with a comb or your fingers. For best results with heat styling, apply before blow-drying or using flat irons and curling tools. You can also use it on dry hair as a finishing sealer for added smoothness and protection.