Hello,

unfortunately Heptane and Hexane are regulated strictly in the EU, so that you can't acquire them without some kind of signed permission. (At least I couldn't find it anywhere uncontrolled)

In case there is no source for Heptane or Hexane in europe, is there an alternative solvent to use for re-x, that does not pull impurities as easy as naphta and low solubility at room temp?

Any hints are greatly appreciated

Have a look at 'Panel Wipe', used for cleaning cars prior to painting. Should be able to find that at most motor factors. Normally its straight heptane/hexane.

Browse a site where you can find said Panel Wipe, then just google "product name + MSDS".
Then you can confirm whether it is straight heptane/hexane or contains undesirable additives.

Pure Heptane here.
Used this with great success and now have 6L stocked up
If you can not get it delivered to you at least you know another product to look for in your area.

Thank you a lot!!