Dit da jow .................... ?

Hey guyz, one of my frinds came from china and he is a master of snake kung fu, though he is not really a chinese, his palms are rock hard and he said that u need to condition them and later, a plant herb is rubbed on u'r hands and it is called Dit da jow, So my question wuz, is there something we can put on our hands as an alternative to dit da jow becuz this herb in not found so easily outside china ?!