KOST USA is the largest family-founded manufacturer, supplier and marketer of antifreeze and functional fluids in the United States. Founded in 1985, we are headquartered in Cincinnati, Ohio.

We build both our customers’ and our own brands through high performance products and superior service, primarily in the automotive & heavy duty aftermarket, as well as in the oil & gas sector.



KOST USA manufactures a comprehensive range of high performance ethylene glycol and propylene glycol-based antifreeze/coolants for automotive, heavy-duty, on-road, off-road and marine applications.

Stationary Engine Coolants

KOST USA’s Stationary Engine Coolants are superior inhibited glycols designed for the demanding requirements of stationary engines.

Fire Resistant Hydraulic Fluids

KOST USA’s Fire Resistant Hydraulic Fluids deliver ultimate performance, durability and protection needed to keep your critical equipment up and running.

Heat Transfer Fluids

No matter the heating & cooling needs, KOST USA’s family of glycol-based heat transfer fluids offers a solution that will exceed your requirements.

Natural Gas Dehydration Fluids

KOST USA is your premier provider of high performance products used to keep gas dry and moving down the line while maximizing system life.

Diesel Exhaust Fluids

All of our DEF meets accepted international standards for purity and composition, including ISO22241, and API® (American Petroleum Institute) certification.