Evaporation in cork-sealed bottles?

[Jimmy Buffet]

I have several bottles of bourbon that have a cork cap. I don't consume them at a very fast rate.. Should I add some kind of extra sealant - maybe a strip of vinyl tape or equivalent - around the junction of bottle and cork to add a bit more sealing power?

[joshekg]

I think they will be fine. I just visited my father back east and my collection of whisky, cognac and brandy showed no signs of evaporation. It has been 1 year since I was last back (he doesn't drink them) and some of the bottles are 7+ years old. I didn't notice any difference in taste in the lagavulin and germain-robin xo.

[JMF]

You might want to try storing the bottles on their side like you do with wine, so that the cork stays swelled and doesn't shrink and let in air. You can just leave them on their side for a day or two every few weeks and that should do it.