Why We Use Soy Wax, Not Paraffin: A Candle Ingredient Breakdown

Paraffin wax is the default in most commercial candles for one simple reason: it's a by-product of petroleum refining, so it's abundant and cheap. That doesn't make it a bad material outright, but it does mean the reasons to switch away from it are worth spelling out plainly instead of waving at vaguely as "chemicals."

Where each wax comes from

Paraffin is refined from crude oil. Soy wax is hydrogenated soybean oil — a renewable, plant-based, biodegradable material. Neither fact alone tells you how a candle performs, but it does mean soy wax is a byproduct of agriculture rather than fossil fuel refining, which matters to a lot of people choosing between them.

Burn quality is the bigger practical difference

• Soot: paraffin burns hotter and less completely, producing more visible soot over time — the faint black residue you sometimes see collecting above a candle jar. Soy wax burns cooler and cleaner, with meaningfully less soot buildup.
• Burn time: soy wax has a lower melting point and burns slower than paraffin, so a soy candle of the same size typically lasts longer.
• Scent throw: paraffin is often credited with "louder" scent throw, which is part of why it's stuck around. Soy wax holds fragrance oils well too, just with a slightly softer throw — a trade we make deliberately.

The wick matters as much as the wax

All our candles, including the [Vanilla Soy Candle](/products/vanilla-soy-candle) and [Lavender Candle](/products/lavender-candle), use cotton wicks rather than metal-core wicks. Metal-core wicks (historically sometimes lead-core, now usually zinc or tin) were common in cheaper candles because they help the wick stay upright in softer waxes. Cotton wicks burn cleaner and are the safer, better-tested default for soy wax specifically.

What this means for how you burn a candle

Soy wax has "memory" — the first burn sets the melt pool diameter for the rest of the candle's life. Let it burn until the wax melts edge-to-edge on the first light (usually 2–3 hours for a 100g jar) to avoid tunnelling down the middle. Trim the wick to about 6mm before each relight; this alone does more for clean, even burning than the wax choice itself.