100% non-toxic biodegradable and non-hazardous. Used to remove SALT from larger objects such as cars boats personal watercraft sails machines towing vehicles trucks Trailers and transport vehicles. 32 oz. Concentrate is available W/mixing unit or purchase mixing unit separately. Recommended as the Starter kit for many applications. Mixing unit connects to garden Hose and its receptacle holds 4 oz and withstands water pressure up to 60 psi.