IV Horse IV4 Stable and Yard Disinfectant is a pine based phenolic disinfectant, which is very economically priced and perfect for large areas requiring dinfecting. Disinfectants are designed to destroy harmful bacteria and virus by interfering with the cell wall of the microbes thus destroying them. Ideal for use on large expanse areas requiring disinfection such as stables and stable yards. Disinfectant for yard and stable - a fast, effective, phenolic disinfectant for killing germs fast. With a pine fresh formulation.