Closed Loop System Treatment

MCT 514
Corrosion Inhibitor for Closed Recirculating Systems


Mid South MCT 514 Cooling Water Treatment provides superior corrosion inhibition to multi-metal systems operating at high or low temperatures. Recommended for diesel and other internal combustion engines, hot water heating systems, chilled water circuits and other closed systems containing ferrous and nonferrous metals. Application of MCT 514 in engine jacket cooling water precludes the necessity for pre-softening or de-mineralizing these waters. Prevents deposits, scale, sludge and resultant losses in heat transfer or mechanical efficiency caused by high mineral waters.


  • Multi-metal corrosion inhibitor
  • Prevents scale and sludge
  • Compatible with antifreeze solutions
  • Use in both hot and cold water systems


Internal Combustion Engines — premixed solutions of MCT 514 and makeup water are desirable to assure adequate treatment level in the jacket water. MCT 514 may be added directly, as received, to the engine cooling system. Generally, add one gallon of MCT 514 for each 100 gallons of water in the system to be treated. Test system after chemical addition to maintain 400500 ppm Sodium Nitrite by Nitrite test procedure.

Chilled and Hot Water Systems — MCT 514 may be added directly to closed re-circulating water by pumping directly from the drum, with a by-pass feeder, or any convenient means.


Do not take internally. Not for potable water. Avoid contact with skin, eyes and clothing. If material contacts skin, wash thoroughly with water. If eyes are contacted, flush with water and get medical attention. Keep container closed when not in use. Does not deteriorate with age.

Available Packaging

5 gallon pail

46 lbs

15 gallon drum

138 lbs

30 gallon drum

276 lbs

55 gallon drum

507 lbs


Use Nitrite drop test kit, code MCI 437, 1/100 for testing.