Essie Non-Yellowing Top Coat Sun Block Protect your perfect manicure from sun damage with this Non-Yellowing Top Coat Sun Block from Essie. Preventing nail polish from changing colour due to UVA/UVB rays with a combination of Titanium Dioxide & Benzophenone that prevent light from entering & altering the polish. Directions for use: Apply as a top coat after applying the last coat of Essie nail polish. Can also be applied between manicures for extra protection.