--- In [email protected], "Per Kristen Fredlund"
<[EMAIL PROTECTED]> wrote:
> If vaselina is a petroleum jelly, why is then all silicone spray
> containing petroleum harmful to the cube-plastic while the vaseline
> is not? I know of course that petroleum is a mix of hydrocarbones
> and various other stuff. But can anyone explain this?
I believe that silicone spray contains the "petroleum distillates" as
solvent -- so that the solution of silicone can be forced out of the
can as a fine spray. (Anyone who knows better, please correct me!)
The solvent is made up of molecules of relatively low molecular weight
and should evaporate quickly, leaving just the silicone on your cube.
On the other hand, petroleum jelly contains longer-chain hydrocarbons,
which is why it's a thick grease rather than a low-viscosity, low-
boiling-point liquid.
Mike
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