Shell ROTELLA® Ultra ELC Antifreeze Concentrate is an extended life ethylene glycol antifreeze for heavy duty diesel, gasoline, and natural gas powered engines. Contains OAT corrosion inhibitor technology that provides effective corrosion protection of engine and cooling system metals. The product is free of nitrites, amines, borates and silicates. Suitable for both heavy duty and light duty applications without supplemental coolant additives (SCAs), making it ideal for use in mixed fleet applications.