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Heavy-Duty Conventional Inhibitor 2792

Formulated for heavy-duty diesel engines.

Penray 2792 is an advanced “fully-formulated” inhibitor package featuring a low-silicate, phosphate-free formula to provide trouble-free service in trucks, buses and additional applications listed below.

Antifreeze/coolant made with glycol consistent with ASTM E1177-14 and Penray 2792 is compatible with CAT EC-1 and other specifications listed below. Penray 2792 offers easy, economical, efficient blending procedures. A concentrated formula, Penray 2792 is added to pure ethylene glycol at 2.2% volume to achieve the product specifications and benefits. Adding an additional 2% of water is optional to minimize product cost. The finished product will meet ASTM heavy-duty specifications and may also be used in diesel engines with traditional supplemental coolant additive.

Store above 50°F (10°C) to prevent gelling.

Blending Instructions: 50/50 Pre-dilute coolant contains 1.1% by volume of 2792
Concentrate Contains 2.2% by volume of 2792

Many heavy-duty applications BENEFITS

  • Cost effective alternative to ELC
  • Single system technology offers the easiest method of manufacturing
  • Phosphate & amine free
  • Lubricity agents extend water pump life
  • Fill-for-Life® program when used with Penray Need Release® filter
  • Meets OEM performance specifications


  • Gen-sets
  • Stationary engines
  • Line heaters
  • Natural gas compressor engines
  • Irrigation equipment
  • Air compressor engines
  • Drilling equipment

• ASTM D-6210
• ASTM D-3306
• TMC RP-323
Using and maintaining a properly formulated coolant is one of the most important aspects of engine maintenance.

Link to INH2792 flyer.



   WARNING: This product can expose you to chemicals including Methanol, which is known to the State of California to cause birth defects or other reproductive harm. For more information go to