Silicone sealants corrode copper?

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Can silicone sealants corrode copper? I have seen it turn copper green, so is it just corrosive as it is setting?
 
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Never seen any reaction with silicone sealants and copper, while its setting or not.
 
Some sealants smell of vinegar (acetic acid ?) so may have a tendency to cause short-term corrosion of copper - or it could be flux residue - most of the agressive ones will cause corrosion
 
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