What Is a Longfill E-Liquid?
A longfill is a DIY e-liquid typically supplied in a 60ml bottle filled with 20 or 30ml of flavour concentrate, providing a custom vape experience by letting you mix the ingredients yourself. The remaining space in the bottle is left empty — ready for you to add a PG/VG base and nicotine shots to complete the liquid.
Think of it like a flavour cordial: highly concentrated, packed with taste, but needing to be diluted before use. You can't vape this flavour concentrate alone — it must be mixed with nicotine and VG/PG before it's ready to vape.
Longfill vs Shortfill: What's the Difference?
What Do You Need to Mix a Longfill?
Turning a longfill into an e-liquid requires the purchase of two or three extra products — namely VG/PG base and nic shots. Here's a complete list:
1. The Longfill Bottle — contains the flavour concentrate (usually 20–30ml in a 60ml bottle)
2. A PG/VG Base — determines the thickness and cloud production of your final liquid
3. Nicotine Shots (Nic Shots) — 10ml bottles of either freebase nicotine or nicotine salt, available in various strengths.
How to Choose Your PG/VG Ratio
For MTL (Mouth-to-Lung) vapes, including most pod kits and starter vape kits, you'll want to aim for a 50/50 blend of PG and VG. For DTL (Direct-to-Lung) and sub-ohm vape kits, you'll need a higher ratio of VG to PG — 70% VG and 30% PG is the standard.
Step-by-Step: How to Mix a Longfill
(Refer to the diagram below)
Step 1: Choose your longfill flavour
Step 2: Select your PG/VG base to match your device type
Step 3: Choose your nicotine shot strength and type (freebase or nic salt)
Step 4: Add the base and nic shots into the longfill bottle
Step 5: Shake your bottle for at least 5 minutes to ensure all of the flavour concentrate and nicotine is evenly distributed.
Step 6 (optional): Let it steep for 24–48 hours in a cool, dark place for enhanced flavour depth
Why Longfills Are the Smart Wholesale Choice
Longfills offer an economical advantage over using traditional premixed 10ml e-liquids or shortfills. For wholesale buyers specifically, the benefits multiply:
Lower cost per unit — you're buying concentrated flavour, not pre-made liquid filled with base ingredients
Higher margins — your customers pay for the full 60ml experience at a fraction of the retail price of equivalent pre-mixed liquids
Wider audience — longfills let you choose the flavour profile you want and vape it the way you want to — no more finding your flavour only to realise you can't use it in your vape kit because it's the wrong consistency.
Regulatory advantage — as a concentrate product, longfills are not subject to the same TPD 10ml bottle restrictions, making them easier to stock in larger quantities.
Freebase vs Nicotine Salt: Which Nic Shot Should You Use?
You can opt for freebase nicotine, which provides a stronger throat hit, or nic salts, which are smooth on the throat and can satisfy cravings faster.
- Nic Salts → Best for MTL devices, pod kits, higher nicotine strengths (10–20mg)
- Freebase → Best for sub-ohm / DTL devices, lower nicotine strengths (3–6mg)
Common Longfill Nicotine Strength Recipes
Is Longfill Right for Your Customers?
Longfills are ideal for:
- Experienced vapers who want full control over their liquid
- Cost-conscious customers looking for better value
- Retailers looking to maximise margin per SKU
- Markets where large pre-mixed bottles face regulatory restrictions
Explore Our Longfill Range
At Links, we supply premium longfill e-liquids to wholesale buyers worldwide with 48-hour shipping and dedicated account management. Browse our collection or contact us to discuss bulk pricing.