Black Light UV Reactive Hair Spray. Our UV Reactive hair spray applies like normal hair spray to your normal style of hair and is not visible during the day or night under regular light. To unleash the fury of this atomic glowing UV hairspray simply expose to any black light or Ultra Violet Light Source and watch your hair glow bright as day. This temporary, washable spray will turn any surface you spray, including your hair into a Glowing Wonder. This spray will only illuminate and be visible under UV Light, otherwise the hairspray function just as regular hairspray would! Great for parties, Raves, Halloween or any time you want to accent your hair with wild glowing style!