Design Essentials® STS EXPRESS Smoothing System Thermal Therapy Leave-In Sealant – Step 3 is an intensely moisturizing leave-in conditioner designed to restore moisture balance to hair while providing long-lasting protection against heat styling and environmental damage. Infused with antioxidants and botanicals that work synergistically with the full STS treatment.
- Seals the cuticle for a soft, shiny finish
- Promotes stronger, healthier hair with anti-frizz protection and long-lasting shine
- Designed for all hair types