Odour killer Concentrate 5LtOdour Killer is blend of organic oils and enzymes that break down the molecules that cause the odour rather than merely cover up one odour with another. Eliminates all offensive odours such as urine, cigarettes,strong animal and pet odours (including male cat odour). Safe4 Odour Killer is : Non Toxic. Non Staining. Non tainting. Non corrosive. Non irritant. Biodegradable. Does NOT contain Phenols, Aldehydes or alcohol. Note: This is Concentrate Odour