WD-40 Myths and Truths

[Regmil]

I raced two stroke four wheelers back in the day..I would spray it all over th engine and it would rinse off the mud/dirt so easy. Just don't spray it on the foot pegs and seat..YIKESS

 

[VHinch]

From their MSDS....
3 - Composition/Information on Ingredients
Ingredient.........Weight Percent

Aliphatic Hydrocarbon..........45-50%

Petroleum Base Oil................<25%

LVP Aliphatic Hydrocarbon....12-18%

Carbon Dioxide......................2-3%

Surfactant.............................<2

Non-Hazardous Ingredients....<10

My info came from an old MSDS, and is apparently out of date. It is interesting though that the MSDS sheets for WD-40 as sold in Canada still list Stoddard solvent. From http://www.wd40company.com/files/pdf/msds-wd447382569.pdf -

SECTION 3 COMPOSITION INFORMATION ON INGREDIENTS

Ingredient...........................CAS Number.......Percent
Stoddard Solvent..................8052-41-3.........45-50%
Petroleum Base Oil...............64742-65-0........30-35%
Non-Hazardous Ingredients..Proprietary........<10%
Carbon Dioxide....................124-38-9............2-3%