Emtrix® is an easy-to-use liquid nail solution that is recommended for the local treatment of toenail and fingernail fungus and improves the appearance of nails. Helps reduce the growth of certain fungi known to cause fingernail and toenail infections. Solution of urea and lactic acid.Emtrix® comes in a 10 mL plastic tube with a silicone pinpoint tip to facilitate application to the nail.