I order Durasole six bottles at a time! One of the most important products I use for my horses. Maybe next to their feed and hay! I am not that methodical about it… if the feet seem soft or it is wet or about to get wet, I use it. Wear gloves and use the wire end of one of those hoofpicks with the brush on one end. Brush it in gently, especially along the white line, and be sure to not let any particles backfire into your eyes!
Follow that up with a turpentine-based concoction my farrier invented, which I paint along the bottom of the outside of the hoof.