Isdin Ureadin Ultra 40 Exfoliant Gel-Oil-30 ML intense callus exfoliation and gentle reduction of thickened nails. Intense exfoliation of thickened areas, such as localized calluses or nail abnormalities. Facilitates the penetration of antifungal treatment by smoothing the upper layers of the skin and nails. Key component Urea 40%. Indication Gel-oil for thickened skin and nails. How to use Apply once or twice a day to the cleansed area. Wash your hands thoroughly after application. For the best results, use with Ureadin Podos Gel Oil.