See a visible difference with Kerasal Fungal Nail Renewal. Kerasal fungal nail renewal has clinically proven ingredients to improve the appearance of nails damaged fungus. Combining the keratolytic properties of urea with hydrating and fortifying propylene glycol and lactic acid, Kerasal's patented nail repair deeply penetrates the nail plate. Kerasal nail care reduces discoloration and thickness, hydrates and exfoliates. Cover each nail with a thin layer of clear coat using the precision applicator.