What does a gloss do for your hair? A hair gloss strengthens and seals the surface of the hair fiber and leaves high-shine, smoothing the cuticle. Kerastase hair gloss is an at-home treatment for colored hair and another in-salon treatment for glass-like smooth hair. Chroma Absolu Soin Acide Chroma Gloss Hair Gloss is a high shine glossy hair treatment for color treated hair. Our in-salon hair gloss treatment called K-Water, is our first resurfacing Lamellar high shine treatment for hair. The hair gloss before and after shows the fluid, glossy transformation of the hair. Find the best hair gloss treatment and glossy hair products for your hair styling needs.