Thread: Can all night soaking in WD40 cause chain rust?
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Old 02-11-09, 07:35 AM
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DaveSSS 
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Originally Posted by JanMM
Not directly.
Indirectly, after the WD40 all evaporates away, what is left to prevent rust?
WD-40 contains about 30% oil. Once the solvent evaporates, it DOES provide protection from rust.
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