Pratt & Whitney approved the use of Houghton’s Hocut 4940 in the production of their aircraft engines and military power units.

Specifically the metalworking fluid is cleared for contact with a variety of aerospace alloys, including aluminium, steel, stainless steels, nickel-based alloys, single-crystal nickel alloys, cobalt-based alloys, magnesium, titanium and titanium-based alloys.

The fluid is both chlorine free and does not contain either formaldehyde releasers or any other secondary amines. Gary Dukus, Houghton’s business development manager claimed that the metalworking fluid “conforms to all health and environmental regulations”