Deri-Sal Cattle Ointment assists in the healing of cracks, sores, and wounds. Prevents chapping and infections on cows teats and udders. Active constituents: Zinc Oxide 30g/kg, Boric Acid 15g/kg Directions for use: Udder and teats should be clean and dry before milking to reduce contamination and residue in milk. Teats and udders should be clean and dry before applying Der-Sal ointment. Apply a small amount and rub into cows teats. For cracks, sores and wounds wash and dry the affected areas and apply once or twice daily.