The base for WD-40 base is supposedly fish oil, with a shot of ether for the aroma. Dunno if they still use the ether nowadays. I remember reading about the invention of WD-40 way back when and the guy who came up with the final formula mentioned noticing that commercial fishermen used the oil from the fish they caught to lube and coat the metal parts on their boat to protect their metal parts. Not sure if he was talking about pre-motor boats or not.
An official history from the maker of WD-40 (
http://www.wd40.com/AboutUs/our_history.html)
“In 1953, a fledgling company called Rocket Chemical Company and its staff of three set out to create a line of rust-prevention solvents and degreasers for use in the aerospace industry, in a small lab in San Diego, California.
It took them 40 attempts to get the water displacing formula worked out. But they must have been really good, because the original secret formula for WD-40—which stands for Water Displacement perfected on the 40th try—is still in use today.
Convair, an aerospace contractor, first used WD-40 to protect the outer skin of the Atlas Missile from rust and corrosion. The product actually worked so well that several employees snuck some WD-40 cans out of the plant to use at home.”
An interesting note from another page at the WD-40 website at
http://www.wd40.com/Brands/wd40_faqs.html:
“What does WD-40 contain?
While the ingredients in WD-40 are secret, we can tell you what WD-40 does NOT contain. WD-40 does not contain silicone, kerosene, water, wax, graphite, chlorofluorocarbons (CFCs), or any known cancer-causing agents.”
I tried to google this to get some documental proof, and so far all I found was the following (from the above WD-40 web page) “The chemist, Norm Larsen, was attempting to concoct a formula to prevent corrosion—a task which is done by displacing water”. Elsewhere it’s said that three technicians came up with the final formula.
I found an interesting reference to some people that tried to analyze the ingredients of WD-40 at
http://yarchive.net/chem/wd40.htmlMost telling according to the MSDS (at:
http://www.atmos.umd.edu/~russ/MSDS/wd40.htm) is that the main ingredient is apparently something called “Stoddard Solvent”. Of course there’s no mention of fish oil. I tried to Google the chemical composition of fish oil, to see if there is any correlation to the MSDS data, but gave up because there are too many pages of “health related” web pages to wade through. If anyone knows what the makeup of fish oil is from a chemist POV is, please let us know.