C&H 810S is a multi-metal safe corrosion inhibitor for use in diesel engine cooling systems to protect from premature failure due to corrosion. C&H 810S is packaged as a stick capable of being easily and safely added directly into filler necks of cooling water systems. C&H 810S dissolves quickly in warm water and will not freeze in cold weather months. One box is sufficient to treat any common locomotive cooling system (275-350 gallons).