Sealing for volatiles

I sealed with parafilm my alcoholic beverages, which I would like pick up something.
In older bottles where the cork is not really close, can feel free to evaporate once the alcohol, thus minimizing the level. I hope to prevent by parafilm. Whether the klappt- or non- I will, however, can only find out in a few years.
One just has to get used to the handling, I have the first attempts often times torn a piece, now I manage quite well to wrap a bottleneck.