The Hoof Hardener from Keratex strengthens and protects shod and unshod hooves; prevents cracks and hoof breakage so that shoes stay on tight and the horse remains sound. Ideal for weak hooves, horses that are worked barefoot, brood mares, foals and yearlings soft soles prone to brushing. Strengths the molecular structure of the hoof horn and sole by cross- linking keratin. With no surface coating residue, the foot is still able to breath, you will quickly notice an improvement in your horses hooves.