Seal the deal with step three - SILKY:SMOOTH Heat Activator. This leave-in spray works to deliver a powerful heat-activated polymer that provides an invisible barrier around the cuticle to seal in moisture and nutrients while locking out frizz caused by humidity. Infused with rich ingredients like Macadamia nuts, vegetable fats and oil, this formula detangles and softens hair while providing UV protection. ItÕs also safe for hair extensions and to add on after chemical services to help lock in color, repair damage and seal the cuticle. The result is dramatically smooth and shiny hair that lasts for days, even after a few washes.