Candle wax comes from three broad sources: petroleum, plants, and animals. Most candles on store shelves are made from paraffin, a byproduct of crude oil refining, but soy wax has surged in popularity and now holds roughly 43% of the luxury candle market. Beeswax, tallow, and tropical plant waxes round out the options, each with a different origin story.
Paraffin: A Byproduct of Oil Refining
Paraffin wax starts its life deep underground as crude oil. During refining, crude is heated in a vacuum distillation column to separate it into fractions by weight. The heavier fractions contain a mix of oil and wax molecules. A solvent extraction step removes unwanted compounds, leaving behind a blend that’s ready to be split into lubricating oil and wax.
The separation step, called dewaxing, works by chilling the mixture with a solvent until the wax solidifies into crystals while the oil stays liquid. This slurry is fed onto rotating filter drums that pull liquid through a cloth, trapping solid wax on the surface as a “cake.” Nitrogen gas blows the cake off the cloth, and the result is called slack wax, which still contains 5% to 30% oil.
For candle-grade paraffin, the slack wax goes through additional rounds of the same chilling and filtering process (called deoiling) to strip the oil content down further. The final product is a clean, white solid that melts between about 46°C and 68°C (115°F to 154°F), depending on the grade. Lower-melting paraffin is used for container candles; higher-melting versions hold their shape as pillars and tapers.
Soy Wax: Extracted From Soybeans
Soy wax is made by hydrogenating soybean oil, the same oil used in cooking. Hydrogenation adds hydrogen atoms to the oil’s fatty acid chains, converting a liquid fat into a solid one. The process is essentially the same chemistry behind turning vegetable oil into margarine. The resulting wax is soft, creamy, and melts at a wide range of temperatures (49°C to 82°C, or 120°F to 180°F) depending on how heavily it’s been processed.
Because soy wax is relatively soft on its own, manufacturers often blend it with other waxes or add stearic acid, a fatty acid derived from either tallow or vegetable oil, to help candles hold their shape in warm weather and release more easily from molds. Stearic acid has been used as a wax modifier in candle making for over 150 years.
Beeswax: Built by Honeybees
Beeswax is the only candle wax produced by a living creature. Worker honeybees secrete it from glands on the underside of their abdomens. The process is energy-intensive: bees ramp up fatty acid and energy metabolism in their wax glands to synthesize the wax, and they consume significant quantities of honey to fuel the work. The wax emerges as tiny, translucent flakes that the bees chew and mold into honeycomb.
Beekeepers harvest the comb after extracting honey, then melt it down, filter out debris, and pour it into blocks. The natural color ranges from pale yellow to deep gold depending on the flowers the bees visited. Beeswax melts in a narrow band around 62°C to 65°C (144°F to 149°F), which makes it firm enough for freestanding candles without additives. Its naturally sweet, honey-like scent is part of its appeal, but it also makes beeswax one of the most expensive candle materials.
Tallow: Rendered Animal Fat
Before paraffin existed, most ordinary candles were made from tallow, the rendered fat of cattle or sheep. The rendering process involves slowly heating raw beef or mutton fat to melt it, then filtering the liquid multiple times to remove connective tissue and impurities. Well-rendered tallow is neutral in smell, smooth, and solid at room temperature.
Tallow candles largely disappeared once paraffin became widely available in the mid-1800s, but they’ve seen a small revival among people looking for animal-based, minimally processed alternatives. Poorly rendered tallow retains impurities that make candles smell unpleasant and burn unevenly, so the quality of the rendering step matters more here than with any other wax type.
Palm Wax: Crystallized From Tropical Oil
Palm wax comes from palm oil, which is pressed from the fruit of oil palms grown primarily in Southeast Asia. The oil is separated into solid and liquid fractions through a process called dry fractionation: the oil is melted, then cooled under carefully controlled conditions so that specific fat molecules crystallize out while the rest stays liquid. The solid fraction is collected and further refined into a hard, brittle wax.
What makes palm wax distinctive is its crystal structure. When cooled slowly in a candle mold, it forms feathery, snowflake-like patterns on the surface that no other wax replicates naturally. The environmental cost of palm oil production, including deforestation and habitat loss, has made this wax controversial, and many candle makers now seek certified sustainable sources or avoid it entirely.
Bayberry and Other Botanical Waxes
Bayberry wax has a long history in North America. It’s harvested by gathering ripe bayberries in the fall and boiling them in water. The wax separates from the fruit and floats to the surface, where it can be skimmed off and filtered. A bushel of berries yields only four to five pounds of wax, which is why bayberry candles have always been a luxury item rather than an everyday light source.
Other plant-based waxes show up in specialty candles or as additives. Carnauba wax, scraped from the leaves of a Brazilian palm tree, is extremely hard and is sometimes blended into softer waxes to raise their melting point. Coconut wax, hydrogenated like soy, burns slowly and holds fragrance well but is too soft to stand alone in most candle formats.
A Brief History of the Shift
For most of human history, candles meant animal fat. Tallow was cheap and available wherever livestock were raised, though it smoked and smelled. Beeswax burned cleaner but cost far more. In colonial America, spermaceti, a waxy substance found in a large cavity in the sperm whale’s head, became the premium candle material. Extracting it required separating spermaceti from the oil also present in the head matter. By the 1750s, entrepreneurs in New England were establishing candleworks specifically to refine spermaceti, and the resulting candles were prized for their bright, odorless flame.
The petroleum age ended all of that. Once paraffin could be mass-produced from oil refining in the mid-1800s, it undercut every other wax on price and consistency. Paraffin dominated the candle industry for over a century. The recent shift toward soy, coconut, and other plant waxes is driven largely by consumer preference for renewable materials, not by any fundamental change in how wax works inside a candle. The chemistry of burning is the same regardless of source: a wick draws melted wax upward by capillary action, the heat of the flame vaporizes it, and the vapor combusts to produce light and heat.