If you're coming in for balayage or highlights every 3-4 months and nothing in between, you're probably spending the last several weeks of that cycle with hair that looks dull, brassy, or just not quite right. A gloss appointment in between changes that entirely. What a Gloss Actually Does A gloss is a semi-permanent color treatment applied to the entire hair surface. It deposits tone (neutralizing brassiness or adding warmth), seals the cuticle flat, and adds a coating of sh