E-Liquid Concentrate shelf life

I have quite a few flavors in my stash and feel that some are losing their potency after 9 months. They are all kept in the basement around 70 degrees and mostly in the dark except when I’m down there. The flavor that I clone the most is Castle Long which I made a 1000 ml last November. As that was getting low I mixed up a small batch two weeks ago and it doesn’t have the same flavorful draw that I remember neither does the remains of the 1000 ml. So do the flavor concentrates degrade over time?
Thanks for any help I receive, Vince


What do you store you e-liquids in?

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I’ve noticed some do… coffee ones are the worst. If I smell them and they smell kind of funny or they start getting crystals on them… I throw them out.

The ones I use the most would never stay around long enough to rot!


The concentrates are in the original plastic bottles. Once I mix the liquid goes in glass, I have sizes up to 1000 ml bottles (brown and blue). I just hate to throw away the concentrates (some are unopened)I have but if their bad their bad so next time I will buy just what I will be mixing next.
Thanks for the response


Sunlight will destroy your flavours
Heat will destroy your flavours
Plastic bottles with liquid in can leach chemicals like cleaning agents etc
Shelf life is usually 9-12months

Keep your flavours separated from everything, in a dark, room temperature place or do what @Pugs1970 does and store them in a dedicated fridge, on a low setting??


As others have mentioned long term storage of concentrates in plastics isnt ideal. Trick is to buy what you will use within a year. If they are in PE or PET plastic they will last a bit longer than LDPE as PE is a bit less permeable.

I store all of my large volumes in glass and smaller volumes in their original container, these are what i know ill use up quickly. The large volume flavorings go in a mini fridge.

Cold will help prolong their shelf life, such as a mini fridge. But dont keep anything stinky in the same fridge, smells dont just leech out they leech in too.

If you get any crystallization, by storing in a fridge, then hold the concentrate in your hand to warm it up. When the crystals dissolve shake the hell out of it.


yep, lowest :+1:

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I recently spoke with both Capella and TFA, these are their guidelines. While shelf life is based on a number of factors including environmental and handling, the fact is that flavors (given proper care) don’t really spoil and have no predetermined expiration date. Personally though, I use generally them within a year.

The temperature should not be above 77 deg and or exposure to high humidity. Flavors are best kept in the dark but if temp and humidity is a concern, a fridge or wine cooler is best.

In addition, flavors should only be kept in plastic bottles for 2-3 months, then transferred to glass without plastic droppers.