- Tue Sep 30, 2014 9:12 am
#40179
WD40 is a petroleum based product, consisting mainly of "aliphatic hydrocarbons" (like naphtha or white spirit) and a light mineral oil. O-rings on chains are made of oil-resistant rubber, nitrile or similar, and will not be damaged by the stuff that's in WD40. This is made explicit on the WD40 website. My Yamaha owner's booklet says to clean the chain with kerosene, which contains a similar mix of hydrocarbons.
WD40 damaging O-rings is one of those urban myths that gets repeated so often people believe it's true. It isn't.
WD40 damaging O-rings is one of those urban myths that gets repeated so often people believe it's true. It isn't.