The main solvent in WD-40 that is mixed with the oil is kerosene.
I wasn't 100% sure, but as far as I knew, there was no kerosene in WD-40, along with many other ingredients you might think be in there.
After checking their site, I came across this little tid-bit........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.
Rapid Remover, It works every time.
Spray it on and let it sit for about 30 seconds, then scrape it off with a 4" blade. Then clean up the Rapid Remover with Denatured Alcohol.