Quote Originally Posted by bizzarro View Post
Well I tested with UGL oil with EO base and after months the plunger rubber was intact.
That's good news. All the more reason to test before a trip.

I'm not a brewer but I'm sure it has something to do with the amount of EO used for solution.

Common sense can't be applied to all situations but if EO dissolves plungers and your plunger didn't dissolve then it makes sense that the concentration of EO wasn't high enough.

It's also possible that the EO used in my gear wasn't pharmaceutical grade.