Rusk Thermal Serum with Argan Oil 4.2 Oz

The Rusk Designer Collection Thermal Serum with Argan Oil is a highly concentrated, alcohol-free hair serum that works by smoothing and sealing the hair cuticle at the source — instantly eliminating dryness and frizz upon contact. At its core, the formula is powered by pure Argania Spinosa (Argan) Kernel Oil, a nutrient-dense Moroccan botanical renowned for restoring softness and luminosity, combined with a silicone-rich base of Cyclopentasiloxane, Dimethiconol, and Amodimethicone that wraps each strand in a weightless, protective shield against heat and humidity. The addition of Crithmum Maritimum (Rock Samphire) Extract and Laminaria Digitata (Kelp) Extract provides marine-derived antioxidant reinforcement, helping repair and continuously protect hair from the cumulative damage caused by thermal styling tools. The serum's cuticle-sealing action locks in moisture while defending against humidity-induced frizz, delivering a sleek, polished finish that lasts without greasiness or buildup. The lightweight dropper-style formula absorbs rapidly without weighing hair down, leaving strands visibly smoother, softer, and infused with a healthy, glossy sheen. It is versatile enough to be used on both wet and dry hair, making it equally effective as a blowout prep or a finishing serum. This product is especially ideal for those with color-treated, chemically processed, dry, or frizz-prone hair of all types who want salon-quality smoothness at home. How to Use Apply 2 to 6 drops to damp or dry hair before or after heat styling — adjust the amount based on your hair's thickness and length. On wet hair, work evenly through sections and proceed to blow-dry for a silky, smooth result. On dry hair, use it as a finishing treatment by smoothing a small amount over the surface of styled hair for instant shine and frizz control. Avoid applying directly to the scalp to prevent buildup.