Formula H disinfectant is the number one choice for animal hygiene by the veterinary profession and top breeders. • Kills airborne viruses at regular intervals • One dilution rate kills everything • Evaporates at a controlled rate, not straight away • Stays where you put it • Use only once a day • Effective against fungi, bacteria and viruses including ringworm, kennel cough and canine parvovirus Formula H is the safest, most effective and most economical small animal pathogen killer 500ml spray. Active ingredients consist of Benzalkonium Chloride and Glutaraldehyde.