When it comes to crafting reed diffusers, the base you choose makes all the difference - not only in how beautifully your scent carries through a room, but also in the sustainability and safety of your finished product. While many bases may look similar, they’re not created equal. Most diffuser blends fall into one of three main categories: glycol-based, alcohol-based, and bio-based formulations.
Let’s break down what sets them apart.
1. Glycol-Based Diffuser Bases (DPG or DPM)
Glycol bases such as Dipropylene Glycol (DPG) or Dipropylene Glycol Monomethyl Ether (DPM) are among the most traditional diffuser solvents used worldwide. They’re petrochemical-derived, cost-effective, and deliver a slow, stable scent release.
However, their heavier molecular structure can sometimes restrict scent throw, especially in cooler environments. They also have higher VOC (volatile organic compound) levels and are not biodegradable, making them less aligned with today’s clean and eco-friendly expectations.
Common characteristics:
-
Derived from petrochemical sources
-
Slower evaporation = longer but softer scent diffusion
-
High flash point (≈ 180–200 °C)
-
Often paired with ethanol to boost lift
-
Not ideal for brands focused on clean beauty or sustainability
2. Alcohol-Based Diffuser Bases (SD Alcohol or Ethanol)
Alcohol bases are light, fast-evaporating carriers known for delivering a strong initial scent throw. They’re popular in commercial fragrance blends and sprays because they release fragrance molecules quickly into the air.
The downside? That quick evaporation can shorten overall longevity, and alcohol can be drying and flammable, requiring extra care in handling and storage.
Common characteristics:
-
Thin and volatile for immediate scent impact
-
May require frequent reed flipping
-
Often flammable and regulated as dangerous goods for shipping
-
Less sustainable and not considered clean-beauty aligned
3. Bio-Based Diffuser Bases (Augeo-Type or Eco Blends)
The newest and most sustainable category is bio-based diffuser bases — like Wickii’s Eco Diffuser Base. These are glycerin-derived solvents made from renewable plant sources such as sunflower, rapeseed or soybean.
They’re biodegradable, vegan-friendly, and non-toxic, with low VOC emissions and excellent solubility for fragrance oils. Their balanced evaporation profile means diffusers made with these bases last longer while maintaining a consistent scent throw throughout their life.
Common characteristics:
-
Made from renewable plant glycerin
-
Biodegradable and cruelty-free
-
Excellent fragrance solubility and longevity
-
Low odour, low VOCs, non-flammable
-
Perfect for eco-conscious and premium home fragrance brands
Choosing the Right Base for Your Brand
Each base type offers something different. Glycol bases are tried-and-true but dated in sustainability and the clean-beauty movement shifting away from petrochemical solvents toward plant-derived, biodegradable options.
Alcohol bases deliver quick scent impact but fade fast. Bio-based systems represent the modern evolution of diffuser science - combining high performance with clean, planet-friendly chemistry.
✨ The Takeaway
The diffuser base isn’t just a carrier, it’s the foundation of your product’s identity. Whether you’re formulating for sustainability, strength, or simplicity, understanding your base chemistry helps you make informed choices for your brand and your customers.
