Longfill Flavors: Easily mix your own e-liquid
Your Guide to Longfill Flavors: Simple, Flexible, Affordable
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Mixing longfills: It’s that easy (guide)
1. Preparation
Have your longfill flavor, your base and (if desired) your nicotine shots ready. Make sure everything is clean! (What do I need?)
2. Add nicotine shots
Open the longfill bottle (cap & drip tip). Add the calculated number of nicotine shots to reach your target strength. (How many shots?)
3. Top up with base
Carefully fill the rest of the bottle with your nicotine-free base – usually up to the top edge of the label or just below the bottle neck.
4. Shake & steep
Close the bottle tightly and shake vigorously for 1–2 minutes. Optionally let it steep afterward (Steeping time?). Done!
Is it worth it? Pros & Cons of Longfills
👍 Pros
- • Very cost-effective: Significantly cheaper per milliliter than ready-made liquids.
- • Maximum flexibility: You decide nicotine strength and PG/VG ratio yourself.
- • Easy handling: No separate measuring of flavoring required, everything in one bottle.
- • Large selection: Huge variety of longfill flavors available.
⚠️ Cons & Effort
- • Mixing required: You need to add base and optionally shots yourself.
- • Steeping time: Some flavors taste better after a few days of steeping (see FAQ).
- • Additional purchases: You need to buy base and nicotine shots separately.
⭐ Top brands for longfill flavors:
Many popular e-liquid manufacturers also offer their flavors as longfills. These include, among others: Dr. Frost, Vampire Vape, Dinner Lady, Riot Squad and many more. Browse our selection!
What’s the difference between longfill, shortfill, and pure flavor concentrate? 🤔
All three are used for DIY mixing, but in different ways:
- • Longfill: Contains only the flavoring in a large bottle. You add the remaining liquid yourself (base + nicotine shots). Maximum flexibility for nicotine strength and PG/VG ratio.
- • Shortfill: Already contains flavoring AND nicotine-free base (usually high VG) in a large bottle that isn’t completely full. You only add nicotine shots (or nicotine-free base if you want to vape without nicotine). Easier than longfill, but less flexible regarding the PG/VG ratio.
- • Pure flavor concentrate: A small bottle (often 10 ml) with highly concentrated flavoring. You need a separate mixing bottle and must dose base and shots yourself (often only a few percent flavor is needed). Offers the highest flexibility, but requires more precise measuring.
💡 In short: Longfill = flavor in a large bottle (add base+shots). Shortfill = flavor+base in a large bottle (add shots only). Concentrate = flavor only in a small bottle (mix everything yourself).
How many nicotine shots and how much base do I need for my longfill? ➕
That depends on three factors:
- Size of the longfill bottle (e.g. 60 ml, 120 ml)
- Amount of flavoring already in the bottle (e.g. 10 ml in a 60 ml bottle)
- Your desired nicotine strength (e.g. 3 mg, 6 mg, 12 mg)
Example calculation: 60 ml bottle with 10 ml flavor
- Total volume: 60 ml
- Flavor already inside: 10 ml
- For approx. 3 mg nicotine: 1 shot (10 ml with 18 mg)
- Top up with base: 40 ml base
Example calculation: 120 ml bottle with 20 ml flavor
- Total volume: 120 ml
- Flavor already inside: 20 ml
- For approx. 6 mg nicotine: 4 shots (40 ml with 18 mg)
- Top up with base: 60 ml base
💡 My tip: Use our nicotine calculator or follow the mixing instructions on the longfill label. If you have questions, we’ll gladly help you via chat.
Does longfill e-liquid need to steep? If yes, for how long? ⏳
Not every longfill needs to steep, but many taste better and smoother after some steeping time. This is because the different flavor components need time after mixing to fully blend and develop.
General steeping-time guidelines:
- Fruity / fresh liquids: Often vapeable after a few hours up to 1–3 days.
- Sweet / creamy / dessert liquids: Usually benefit from longer steeping: 3 days up to 2 weeks (or longer).
- Tobacco liquids: Often need the longest steeping time: 1 week up to 4 weeks (or more).
How to steep
- Store the closed bottle in a cool, dark place.
- Shake briefly once a day and optionally let it “breathe” briefly (cap on/off).
💡 My tip: Most longfills can be vaped right away after a strong shake (“shake and vape”). If the flavor isn’t intense enough yet, just let it sit for a few days and try again.
What do I need to mix longfill flavors? 🛒
The nice thing about longfills is that you don’t need much. The basic setup is simple:
- 1. Your longfill flavor: The bottle with the concentrated taste.
- 2. Nicotine-free liquid base: Choose your preferred PG/VG ratio (e.g. 50/50 or 70/30 VG/PG). You need enough base to fill up the longfill bottle (minus flavoring and shots).
- 3. (Optional) nicotine shots: Small 10 ml bottles with highly concentrated nicotine (usually 18 mg or 20 mg/ml) to reach your desired final strength.
That’s it. Extra mixing accessories such as syringes or gloves are usually not required for longfills, because you pour directly into the large bottle.
🛒 Complete kit? Check out our DIY bundles — there are often packages with flavor, base, and shots.
Is mixing longfills safe? What should I watch out for? 🛡️
Yes—mixing longfills is very safe if you follow a few basics, especially when handling nicotine shots:
- • Avoid skin contact with nicotine: Highly concentrated nicotine (in the shots) can be absorbed through the skin. Work cleanly and wash your hands thoroughly after mixing. If you have sensitive skin or feel unsure, wear disposable gloves.
- • Do not ingest: Nicotine is toxic if swallowed. Always keep shots and mixed liquids out of reach of children and pets.
- • Work cleanly: Use a clean workspace to prevent contaminating your e-liquid.
- • Store correctly: Keep base, shots, and finished liquids cool, dark, and tightly closed.
The flavoring and the nicotine-free base themselves are harmless with normal handling.
✅ Bottom line: With a bit of care, mixing longfills is easy and safe.
