A premium hoof hardener developed to protect brittle hooves,- Strengthen soft soles and disinfect frogs prone to fungal and bacterial attack- Contains naturally bio- available sulphur for maximum hoof horn integrity. – Size: 250mlDirections for Use: For best results apply Rock Hard to the frog and sole with the brush provided daily. Paint around the lower half of the hoof, allowing the fluid to seep into nail holes and splits. For maintenance of healthy hooves apply Rock Hard weekly. For animal use only. Replace lid after use. Store in a dry place. NAF recommend a small patch test is carried out prior to initial use.