Nubar's UV503 UV Gel Top Coat Sealer is a thin UV finishing gel that does not have a tacky layer after curing. The UV503 cures in less than 1.5 minutes with a 36-watt light and slightly longer with lower wattage light systems. UV503 eliminates buffing needed to finish artificial nails. You can use over all artificial nails systems like Acrylic and Color Gels for the brightest finish available. The UV503 is solvent resistant and delivers a high shine finish and can easily be removed with the use of a white block or file.