Most candles are made from one of two waxes: soy or paraffin. The names show up on nearly every label, but what they actually mean for how a candle burns, smells, and lasts is less commonly explained. Here's what separates the two, without the marketing shorthand.
What Each Wax Is Made From
Paraffin wax is a byproduct of petroleum refining. Crude oil is processed into fuel, and paraffin is one of the solid residues left behind, later refined and deodorized for candle use. It has been the standard candle wax for well over a century because it's inexpensive, holds fragrance and dye well, and is easy to work with at scale.
Soy wax is made from soybean oil. The oil is extracted, then hydrogenated, a process that turns it from a liquid into the soft, opaque solid used in candle making. It became widely available in the 1990s as a plant-based alternative to petroleum-based waxes, and has since become one of the most common choices for container candles.
The distinction between "vegetable-derived" and "petroleum-derived" is the starting point for most of the practical differences below.
Melting Point and Burn Behaviour
Soy wax has a lower melting point than paraffin, generally somewhere in the range of 45–55°C, compared to paraffin's higher range of roughly 50–70°C depending on the blend. That lower melting point is why soy candles tend to burn more slowly: less energy is needed to keep the wax liquid, so the fuel is consumed at a gentler rate. This is also why soy candles are often described as longer-burning than a paraffin candle of the same size, all else being equal.
The trade-off runs the other way for structure. Paraffin's harder, more defined crystal structure makes it better suited to freestanding shapes like pillars and tapers, where soy wax's softness would cause it to slump. This is part of why soy wax is used almost exclusively in container candles rather than freestanding ones.
Soot, Scent Throw and the "Which Is Safer" Question
This is where most online comparisons get overconfident. It's genuinely difficult to find fully independent, unbiased research on this exact question, since most public studies are backed by the industry sources being studied.
What's reasonably settled: a well-made candle, regardless of wax type, produces some smoke and soot as a normal part of combustion. That's chemistry, not a wax-specific flaw. The amount is affected far more by wick quality, wick length, and drafts than by whether the wax is vegetable or petroleum-derived. The National Candle Association, the U.S. industry's own trade body, has stated that independent testing across major wax types found no meaningful difference in burning behaviour or combustion byproducts between them, when candles are properly made and burned.
That doesn't mean wax type is irrelevant to soot and scent. In practice, soy wax's lower burn temperature tends to produce a cleaner-looking flame and less visible soot buildup on glass or metal vessels, while paraffin's higher temperature is often credited with releasing fragrance more forcefully. Neither of those observations amounts to a documented health claim, and it's worth treating strong claims in either direction with some scepticism.
For anyone wanting general background on how volatile organic compounds behave indoors, the EPA's overview of indoor VOC sources is a useful primer, noting that everyday household products, not just candles, are a far larger source of indoor VOCs than most people assume.
Practically, the biggest lever anyone has over soot is wick care rather than wax choice. Trimming a wick before every burn keeps the flame at the height it was designed for and is the single most effective way to reduce soot and uneven burning. If you're working with a wooden wick specifically, here's a full guide to trimming one properly.
Sourcing and Renewability
Soybean oil is an agricultural crop, grown and harvested on a renewable cycle, while paraffin is drawn from a finite, non-renewable resource. That's a straightforward, factual distinction about origin. It's a separate question from whether a given candle is "sustainable" or "eco-friendly" overall, since that depends on the full supply chain: how the wax is processed, where a candle is manufactured, and what the wick and vessel are made from. A candle described as soy-based isn't automatically a low-impact product, and it's worth being cautious of any candle brand, including this one, that implies otherwise without backing it up.
Price and Practical Trade-offs
Paraffin remains the cheaper wax to produce, which is why it's still the default in most mass-market candles. Soy wax generally costs more, which factors into the retail price of soy-based candles. In exchange, buyers typically get a longer burn time per candle, a softer wax that's easier to clean up with soap and water rather than solvents, and a cooler-burning flame that keeps the vessel from getting as hot to the touch.
Neither wax is objectively "better" across every measure. The right choice depends on what you're optimizing for: cost and fragrance intensity point toward paraffin, while burn time, lower burn temperature, and renewable sourcing point toward soy.
Where SOVA Fits In
Every SOVA candle is made with paraffin-free soy wax, poured into a 5 oz (142 g) tin with a natural wooden wick and a burn time of up to 35 hours. That choice was made for the reasons above: the slower burn, the cooler flame, and the softer wax that suits SOVA's tin vessels. The full breakdown of specs and burn instructions is on SOVA's candle care guide, including wick trimming, first-burn timing, and safe extinguishing.
If you're deciding which scent to start with, Mango · Eucalyptus and Maple · Espresso sit at opposite ends of the collection's range, and the full candle collection is worth a look if you'd rather compare a few side by side.
Frequently Asked Questions
Is soy wax better than paraffin wax?
"Better" depends on what you're weighing. Soy wax burns cooler and generally longer, uses a renewable crop rather than a petroleum byproduct, and cleans up with soap and water. Paraffin holds a stronger scent throw, costs less to produce, and holds its shape for pillar and taper candles in a way soy wax can't. Neither wax wins on every measure.
Does soy wax really burn longer than paraffin?
Generally, yes, for a candle of the same size. Soy wax's lower melting point means it needs less energy to stay liquid, so it burns at a slower rate. Actual burn time still depends heavily on wick size, vessel shape, and how consistently the wick is trimmed.
Is paraffin wax toxic?
This gets repeated a lot online, but it isn't well supported. Industry testing across wax types, including paraffin, soy, and beeswax, has found no meaningful difference in combustion byproducts when candles are properly made and burned. Soot and smoke are a normal part of any candle burning, not a paraffin-specific hazard.
Why do some candles mix soy and paraffin wax?
Blending the two is common in the industry. It's typically done to combine soy wax's cleaner burn and cooler temperature with paraffin's stronger scent throw and better shape retention, since 100% soy wax can be trickier to work with for certain candle styles. SOVA candles are made with paraffin-free soy wax rather than a blend.
Does soy wax have a weaker scent throw than paraffin?
Soy wax is often described as having a milder hot throw (scent released while burning) than paraffin, since it burns at a lower temperature. This is why fragrance load and wick choice matter more in soy candles, a well-formulated soy candle can still fill a room effectively. Wick material plays a part too: see wood wick vs. cotton wick candles.
