Strengthens horn within hours of the first application. Prevents premature shoe loss and stops cracks and splits in the hoof wall. This is a patented product with a unique function designed to rebuild the molecular structure of weakened hoof horn without in any way compromising the natural functions of the hoof capsule. Use also on unshod horses and on the soles of horses prone to bruising. The majority of lameness in the horse is found to be in the hoof. Therefore maintaining sound hoof integrity is of prime importance. Please see this site for more information on theses products www.keratex.net/hoof_hardener.htm