Description
Since 1954, STP has been the premier American brand name for automotive additives, lubricants and performance products in the USA. STP Heavy Duty NOAT Extended Life Antifreeze/Coolant Ready-To-Use is a Nitrited Organic Acid Technology (NOAT) formulation that meets or exceeds ASTM requirements. This superior quality, ethylene glycol-based engine coolant is free of phosphates, silicates, amines, and 2-ethylhexanoic acid. It protects cooling system metals including aluminum, as well as rubber hoses, gaskets and plastics. The product is specially formulated with industry-leading additives to provide extended service maintenance protection in heavy duty applications without the addition of SCAs*. Recommended for initial fill or top-off in all gasoline and diesel engines. Prevents pitting caused by cavitation and corrosion of brass, copper, solder, steel, cast iron and aluminum Extended service life up to 1,000,000 miles 8 years or 20,000 hours protection* Recommended for use in engines requiring CAT EC-1 Free of phosphates, silicates, amines, and 2-ethylhexanoic acid Compatible with all major brands of extended life Organic Acid Technology (OAT)-type antifreeze/coolant Ready-To-Use DO NOT ADD WATER STP Heavy Duty NOAT Antifreeze/Coolant Ready-To-Use meets the requirements of the following engine coolant specifications: ASTM D3306, ASTM D6210, and TMC RP329B. *HD Extender may be needed based on test results.
