Lots of things are flammable, there can be a huge difference between that and volatile. ----- Original Message ----- > Or if you don't happen to have a match handy, you could just read the back > of the can "Caution contents Flammable!" > > >> It's easy to find out if WD-40 is flammable. Get a can of it and spray >> it >> above a burning match. WHOOF or not. :-)