Equiderma Zinc Oxide Paste contains zinc oxide and chlorhexidine gluconate for a powerful and potent treatment in the fight against pastern dermatitis, also known as scratches, greasy heel, dew poisoning, or mud fever. Its antibacterial, anti-fungal and anti-dermatophyte properties help horses overcome scratches. Provides 100% sunblock -- an important factor when dealing with pastern problems related to ultra violet light sensitivity. Sulfate free.