Isdin ureadin ultra 40 exfoliant gel-oil, for thickened nails and calluses… Isdin ureadin ultra 40 exfoliant gel-oil is a care that acts through an intense exfoliation of thickened areas, such as localised calluses or nail abnormalities. Adjuvant in antifungal treatment and the treatment of flat warts, onychogryposis and nail psoriasis. Reduces localised thickened skin and nails thanks to Urea ISDIN. Facilitates the penetration of antifungal treatment by smoothing the upper layers of the skin and nails. Gel-oil texture that provides optimum cosmetic effect, facilitating penetration and achieving greater Urea ISDIN stability at 40%.