The wax your candle is made from shapes how it burns, how it scents a room, and what it leaves behind. Soy and paraffin are the two most common options, and they are genuinely different. We pour soy. Here is an honest account of why, and what you should know before deciding which matters to you.

Where each wax comes from

Paraffin is a petroleum by-product. It is refined from crude oil, which makes it non-renewable and, for some people, a reason to pause. That said, paraffin has been the dominant candle wax for well over a century, and the candle industry knows how to work with it. Being petroleum-derived does not make it dangerous in any simple sense.

Soy wax is pressed from soybean oil and hydrogenated into a solid. It is plant-based, renewable, and biodegradable. The crop is primarily grown in the US, which gives it a well-established supply chain. At Muir & Me, every soy candle we make is also vegan and cruelty-free, which matters to a lot of our customers and to us.

Is soy wax actually better, or is that just marketing?

Honest answer: it depends what you are optimising for.

Burn time. Soy burns cooler and slower than paraffin. Our 30cl single-wick candles give 35 to 45 hours of burn time. Paraffin candles of the same size typically burn faster, because paraffin's higher melt point means the flame runs hotter. If you care about getting more hours from a candle, soy is the practical choice.

The wax pool and the melt. Soy melts into a clean, even pool. It also tends to have better memory, meaning it forms a full melt pool more reliably across the life of the candle. Paraffin can tunnel if the first burn is cut short. Neither is guaranteed, but soy is a bit more forgiving.

Fragrance. This one is nuanced. Paraffin actually throws scent very strongly, particularly cold. If you walk past a paraffin candle on a shelf in a shop, the cold throw can be striking. Soy holds fragrance more gently and releases it gradually as the wax warms. Some people find paraffin's throw overpowering. We prefer the quieter, more sustained release you get with soy. It suits the way we formulate our fragrances.

Soot. Paraffin produces noticeably more soot than soy. That dark residue on the inside of a jar, or the faint marks that appear on walls near candles over time, come mostly from incomplete combustion. Soy burns more cleanly. It is not that paraffin is releasing something toxic exactly, but the soot is real and soy produces less of it. Keeping wicks trimmed to around 5mm matters with either wax, but it matters more with paraffin.

What makes a candle non-toxic?

This phrase circulates a lot, and it is worth being careful with it. No candle wax has been shown to be harmful when burned normally in a ventilated room. The alarm around paraffin often comes from studies that measured emissions at very high concentrations, not the kind you would encounter at home with a window cracked.

What you should care about is the fragrance. Some synthetic fragrance blends contain phthalates, which are plasticising chemicals used to help scent cling to things. We do not use phthalates in our fragrance oils. Our Cashmere & Oud candle is a good example: a rich, warm fragrance made without compromise on what goes into the blend.

The lead-free cotton wick matters too. Older candles sometimes used wicks with metal cores to keep them upright. Cotton wicks are the standard now, and all of ours are unbleached cotton. Trim them and you get a cleaner, safer burn regardless of the wax.

Vegan candles: what to check

Paraffin is technically vegan, being a petroleum product rather than an animal one. But some other waxes are not. Beeswax, which is popular in premium candles, involves bees and is not suitable for vegans. Stearic acid, used as an additive in some wax blends, is often derived from animal fat.

Soy wax is plant-based and vegan by nature. All of our candles use soy wax, vegan fragrance oils, and unbleached cotton wicks. Nothing animal-derived enters the process. We are also cruelty-free across the whole range, which you can read more about on our story page.

Why we chose soy

We did not choose soy because it photographs well or because it is fashionable. We chose it because it suited the kind of candle we wanted to make. A slower, quieter burn. A fragrance that builds rather than announces itself. A cleaner pool. Something that felt considered rather than just functional.

We hand-pour everything in Glasgow, in small batches. Soy is more responsive to the process than paraffin. It takes fragrance well at lower temperatures, which means the volatile top notes in a blend are less likely to be cooked off during pouring. That matters when you are working with complex fragrances.

There are things paraffin does better. Cold throw, primarily. And it is cheaper, which is why it remains dominant in mass-market candles. We are not pretending those points do not exist. But for what we make and how we make it, soy is the right choice.

Common questions

Is soy wax actually cleaner than paraffin?

Soy produces less soot and burns at a lower temperature, which results in a cleaner burn overall. It is not that paraffin is dangerous, but soy leaves less residue on jars and walls over time, and the cleaner flame is one of the main reasons we prefer it.

Do soy candles last longer than paraffin candles?

Generally, yes. Soy burns cooler and slower, which typically means more hours from the same volume of wax. Our 30cl candles give 35 to 45 hours. An equivalent paraffin candle would usually burn for less.

Why does my soy candle have a rough or uneven top after burning?

Soy wax is softer and more sensitive to temperature changes than paraffin, so it can show slight sinkholes or an uneven surface as it cools. This is completely normal and does not affect the candle's performance. It is one of the natural characteristics of the wax.

Are all soy candles vegan?

Soy wax itself is vegan, but you need to check the fragrance ingredients and any additives in the blend. Some fragrance oils contain animal-derived components, and stearic acid from animal fat is sometimes used as a hardener. All of our candles are fully vegan, fragrance included.

If you are looking for candles you can feel good about burning, our full soy candle range is a good place to start. And if you are curious about how we approach the whole range, from candles to Aroma Melts to room sprays, our story gives you the background.