Keratex Hoof HardenerKeratex Hoof Hardener formula is patented and includes a unique flexibility agent as well as a hardening agent, making this the perfect product to protect your horse from: brittle, cracked, soft or weak hooves; soft, sensitive or thin soles; repeated shoe loss; transition to barefoot; hoof damage. Keratex Hoof Hardener will strengthen and protect shod and unshod hooves, to restore soundness after sensitive soles and to prevent existing cracks from