http://www.wd40.com/Racing/index.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. - это отсюда
http://www.wd40.com/Brands/wd40_faqs.html