Redken Shine Flash is a lightweight, silicone-based shine spray for all hair types, formulated to smooth the hair's surface and add a glass-like gloss without weighing hair down. The pump-spray formula combines cyclopentasiloxane with a dimethicone/vinyl dimethicone crosspolymer blend and silk powder to lay down a fine, light-reflecting film, and it includes a UV filter (benzophenone-4) to help protect shine and colour from sun exposure.
It works as a cosmetic finisher rather than a rinse-out treatment, so it's best used as a final step: misted onto damp hair before blow-drying to help smooth the cuticle, or onto dry, finished hair to knock down flyaways and add polish.