Keratex Hoof Hardener - Strengthens, Hardens & Protects Hooves, strengthens weak, worn and cracked hooves by improving the molecular structure of the horn itself. Equally effective in wet & dry conditions. Prevents the horn from taking in excess moisture, making it resistant to softening and weakening in wet conditions. This results in a reduction in shoe loss and abscesses. Keratex Hoof Hardener is not an oil or resin layer and does not seal the hoof.