Similar to the No Cracks Blue wax, also molded into small shapes. This wax has no copper sulphate, it has zinc and activated charcoal instead, along with an essential oil blend. For a horse with seedy toe (white line disease), it is recommended to use the blue wax first, then follow up with the black wax later. Also useful if you want to fill a hoof crack but you don't want your horse's hooves blue!