The basics This temporary hair color styling gel is perfect for those who want Color Without Commitment®.  The benefits Our Dye Hard® hair gel will come right out as soon as you wash your hair. This electric color glows under black light!  The uses Apply in thick layers for spikes or a mohawk, or let it dry and then comb out gently for an effect similar to hair chalk. The bottom line Available in an easy to use squeeze 1.66 oz. tube. "This hair gel...can be applied in thick layers...or brushed out...Either way, the color is more opaque than many temporary hair dyes and...glows under UV light." -Allure.com