Sunflower wax or rice bran wax for lip balm: which one, and how much?

Sunflower wax gels oil at 1 to 1.5 percent where rice bran took 8 to 10 in one eight-oil study. Data sheets side by side, gel curves by oil, and use levels per tube.

For a lip balm, use sunflower wax when you want the most structure from the least wax, and rice bran wax when you want a wax that moves a formula gently and forgives a misjudged point. Sunflower is the more powerful of the pair by a wide margin: in one study across eight food oils it gelled at 1 to 1.5 percent, where rice bran wax needed 8 to 10. Rice bran is the more forgiving, because the same weakness means each extra point changes the stick less. Below: the two Koster Keunen data sheets side by side, sunflower gel strength in ten cosmetic oils read off the supplier's chart, and grams per tube.

• Sunflower: congeal 74-77 C, ASTM D938
• Rice bran: melts 77-82 C, USP 741
• Saponification 84-98 against 75-120
• Gels at 1-1.5% against 8-10%
• Sunflower in jojoba: needs 4%
• Candle "sunflower" wax: 54-60 C

The two data sheets, side by side

The cleanest comparison is one supplier's specification for each wax, written to the same house conventions. Koster Keunen publishes both. The lower rows are the use levels this site gives on the sunflower wax and rice bran wax pages, so that the decision and the data sit in one place.

Two things in that table are not on any single supplier page. The first is that Koster Keunen's two descriptions of its own sunflower wax do not agree: the product page says the wax "consists of long chain, saturated C-42 to C-60 esters", while its technical note says it is customarily refined "to a mixture of monoesters, with carbon chains ranging from C-36 through C-48". This site's sunflower page gives totals of about C42 to C58, which sits with the product page. The second is the saponification spread, which turns out to be the most useful number on either sheet.

Why the melting figures cannot be compared directly

On paper rice bran melts higher, 77 to 82 C against 74 to 77 C. That three to five degree gap is not real as printed, because the two figures come from different tests. ASTM D938 is a congealing point: molten wax cools on a thermometer bulb until it stops flowing. USP 741 is a melting test run on heating. A congealing point usually reads lower than a drop point on the same wax, so the sunflower figure understates where that wax finishes melting. The full comparison of methods is in melting point methods, and this site's working drop point for cosmetic sunflower wax is 74 to 80 C.

Independent measurements do not separate them either. In a 2009 study of refined, bleached and deodorised rice bran wax, the bulk crystals melted at 77 to 79 C by differential scanning calorimetry. A 2019 Japanese study of another commercial grade recorded 72 C by the same method. That spread between two grades of one wax is wider than the gap between the two data sheets.

So melting point is not the reason to choose either one. Each finishes melting above the 70 to 80 C water bath most balm recipes use, so each needs the melt taken to about 85 C and held until clear, or the wax melted first in a quarter of the oil and the rest of the batch built on top. The temperature bands for each step are in pour temperatures.

Sunflower is the more powerful: what the numbers show

The claim that sunflower wax is the stronger gelator is not a marketing line. Three independent sets of results point the same way.

In a 2015 study of natural waxes in rice bran oil, sunflower wax was among the efficient oleogelators "forming strong gels at concentration of <2 % w/w", together with candelilla, beeswax, berry wax and one carnauba grade. Rice bran wax, another carnauba grade and fruit wax showed "weak gelling behavior" even at 5 percent. In a 2021 study across eight refined food oils (sunflower, mustard, soybean, sesame, groundnut, rice bran, palm and coconut), sunflower wax "exhibited excellent gelation ability even at 1%–1.5% (w/v) concentration compared to rice bran wax (8%–10% w/v)". That is a factor of five to ten on the amount of wax needed just to set an oil. This site's own figure for sunflower, from earlier oleogel work, is 0.5 percent in soybean oil and 1 percent in canola.

Rice bran wax does have one striking low figure, and it is the source of the idea that the two are equals. In the 2009 study, a mixture of rice bran wax and olive oil at 1 to 99 formed a gel at 20 C, where carnauba needed 4 percent and candelilla 2 in the same oil. That result is real, and it sits beside the figure of about 1 percent in canola that the rice bran wax page quotes. It does not transfer: the same wax was weak at 5 percent in rice bran oil and needed 8 to 10 percent across eight food oils. Sunflower's low figure holds across every oil in the studies above. Rice bran's does not, which is the more useful thing to know about it.

Sunflower wax in ten cosmetic oils, read from the supplier's chart

Koster Keunen's technical note on sunflower wax carries a chart of gel strength against wax level in ten liquids used in cosmetics. It measures how far a cone sinks into the gel, in tenths of a millimetre, so lower is firmer; the cone weight, temperature and time are not stated. The chart's ceiling, 350, is where it puts plain oil, so 350 means no gel. No supplier prints these values as numbers, so the table reads them off the chart.

Three things in that chart change how sunflower wax should be dosed in a lip balm.

The power is all between 1 and 4 percent. From 1 to 3 percent, every oil goes from 350, no gel, to between 62 and 249. From 5 to 10 percent, doubling the wax takes the reading only from about 50 to about 40. That is why sunflower is so effective as a modifier: the 2 to 5 percent range sits on the steep part of the curve, where a single point does a great deal.

Above 5 percent the extra wax buys little firmness. The curve flattens, so a sole-wax stick at 8 or 9 percent is not much firmer on a cone than one at 6. What the extra wax does add, on this site's bench experience, is brittleness, drag and a matte surface, because a cone test sees firmness and cannot see a stick snapping. If a sunflower stick at 6 percent feels soft, the oil blend is the better place to look before adding wax; the faults that come with overdosing are set out in cracked and crumbly balm.

Jojoba is the oil it gels worst, and castor the best. At 3 percent sunflower wax, castor oil reads about 62 and jojoba about 249, barely set. Jojoba needed 4 percent to reach the firmness most oils had at 3, and it stays the softest gel all the way to 10. Paraffin oil and octyl palmitate also needed 3 percent before they set at all. The chart does not explain why. Jojoba oil and castor oil are two of the commonest lip balm liquids, so a jojoba-heavy tube needs a point or so more sunflower wax than a castor-heavy one for the same set.

Rice bran is the more forgiving: what that means

Forgiving is the other side of weaker. A wax that needs more weight to reach the same firmness changes the stick less for each point added or lost, so a misjudged gram costs less. The site's bench figures put the useful sole-wax window at about one and a half points for rice bran and about one for sunflower. Koster Keunen itself pitches rice bran as a stand-in for candelilla: it "can be used as a substitute for Candelilla in many formulations".

The clearest measurement of rice bran's softness comes from the 2019 Japanese study, which was written about stick cosmetics. The authors made gels of 15 percent rice bran wax in macadamia nut oil, set them at 25 C for 24 hours, and pressed a 5 mm ball 2.5 mm into each. The rice bran wax gel read about 20 g, which they called "very soft", against their target of 150 g. Their abstract says an oil gel "made with only rice bran wax as a solidifying agent has lower hardness than the conventional hydrocarbon wax gel, too low for practical usage in stick cosmetics such as lipsticks and lip creams". Under a microscope the gel held spherical clusters of plate crystals rather than an even network, and the authors think impurities acting as crystal seeds are behind them. Replacing 20 percent of the wax with long chain alcohols made from rice bran wax took the gel above 150 g.

That study used one grade and one oil, and its 150 g target was set for a stick cosmetic, so it does not prove that rice bran cannot carry a soft tin balm. It does make a sole rice bran lip tube the structure the evidence supports least. Rice bran's forgiveness pays off beside a base wax, where it adds firmness and oil binding in small steps. The candelilla wax base with 1 to 2 percent rice bran is the combination the vegan beeswax substitutes page builds on for tins and salves.

The saponification spread: a clue to consistency

A likely reason for that difference is printed on Koster Keunen's own sheets. Saponification value tracks the average size of the esters in a wax: the longer the chains, the less potassium hydroxide a gram takes up. A tight band means ester size is held tightly from lot to lot.

Koster Keunen makes that argument for sunflower wax in its technical note. It says its melting point and saponification specifications "are narrow, indicating that the molecular weight distribution of monoesters is also narrow", and that this, with a low free fatty acid level, produces the crystal properties behind gel formation. The note goes on: waxes "with a wide molecular weight distribution of compounds and different solidification points will cause inconsistencies in the gel lattice network", and "narrow molecular weight distribution will provide stronger gels and structures".

Apply that reading to the rice bran sheet. Sunflower's saponification band is 84 to 98, 14 units wide. Rice bran's is 75 to 120, 45 units wide, more than three times as broad, on a wax whose esters also run longer (C46 to C66). Rice bran's acid value limit is higher (13 against 8), and the sheet says its refining lets the wax retain policosanols, phospholipids, phytosterols and squalene. Each departs from the narrow, pure ester cut that Koster Keunen credits for sunflower's gel strength. That is consistent with the spread in the published gelling figures, though no study found has tied a lot's saponification value to its gel strength. The general mechanism, crystal size and surface against hardness, is in oleogels and wax networks.

How much of each, by product

The levels below are the ones this site's ingredient pages give, checked against the measurements above. Percentages are weight percent of the finished balm. Grams are for a 57 g batch, which fills twelve 4.25 g tubes with about 12 percent left in the jug.

Weigh both to 0.01 g. On the 57 g batch one percentage point is 0.57 g, and for sunflower wax in the modifier range that point is the difference between a firm stick and a brittle one. For rice bran the scale matters less, but its lot to lot variation makes an exact batch record more useful.

Converting a beeswax lip balm

Starting factors follow from the gelling results. For sunflower, start at 0.4 times the beeswax weight, the bottom of the band on the sunflower page. For rice bran, start at 0.6, the bottom of the band in the wax substitution calculator, which carries a wider range for it because its behaviour depends so much on the oil.

A worked case on the 57 g batch. A beeswax tube at 12 percent uses 6.84 g of beeswax. At 0.4, sunflower wax comes in at 4.8 percent, or 2.74 g, and 4.1 g goes back to the oils and butters. At 0.6, rice bran wax comes in at 7.2 percent, or 4.10 g, which puts it at the sole-wax level the evidence above trusts least. That is the practical argument for not converting a beeswax tube to rice bran alone: convert it to candelilla at the factors in candelilla vs carnauba, then trade 2 to 3 points of the candelilla for rice bran. A full vegan tube built that way is in vegan lip balm.

Melting, pouring and the defect each one causes

Sunflower wax is easy to under melt. It looks clear several degrees before the last crystals dissolve, and those survivors seed specks through the batch. Take the melt to at least 85 C, hold it there for a few minutes after it looks clear, and pour while it is still well above 75 C, as the sunflower page sets out. Specks that appear anyway are diagnosed in undissolved wax specks.

Rice bran wax causes grit from cooling, not melting. It crystallises as fine needles in a narrow temperature window, and a slow cool grows fewer, longer needles that bundle into a sand you can feel on the lip. Pour tubes at 70 to 74 C and get them cold quickly on a cool surface, not in a freezer. The full diagnosis, including how to tell wax grit from butter grain by feel, is in gritty balm from hard wax, and the reason cooling rate matters is in crystallisation and cooling rate.

The candle wax sold as sunflower wax

One trap is worth knowing before buying either wax by name. A French data sheet for KERAGREEN Sunflower Moulded, described as a "Cast Sunflower Vegetable Wax", gives a congealing point of 54 to 60 C by the same ASTM D938 method Koster Keunen uses, a drop melting point of 57 to 65 C by ASTM D3954, and a needle penetration at 25 C of 25 to 35 tenths of a millimetre by ASTM D1321. Its listed properties are about candles: "very white candles", "no bad smell when burning", and long burn time. The sheet gives no INCI name.

Those figures do not describe the wax this page is about. The congealing point is 14 to 23 C below Koster Keunen's cosmetic sunflower wax on the same method, and the penetration is several times softer than the 2 to 6 dmm that KahlWax gives for its cosmetic sunflower wax on the measuring balm hardness page. A balm built on it at sunflower wax levels would not set as this page describes. If a supplier cannot give you the INCI name Helianthus Annuus Seed Wax and a congealing point in the 70s, do not use the product as cosmetic sunflower wax.

Which one to buy

If you can buy only one, buy sunflower wax. It does more per gram in every oil tested, and it works both as a modifier and as the only wax in a firm vegan tube. Accept that it needs weighing to 0.01 g, a hot melt and a little extra wax in a jojoba-heavy blend.

Choose rice bran wax when the job is to adjust a formula you already like rather than to carry it. At 1 to 4 percent beside candelilla or beeswax it firms the stick, binds oil and adds gloss in small steps, and a point too many is rarely a ruined batch. It is also the better choice for a soft tin or salve, without sunflower's dry, matte set. It is the wrong choice as the only structurant in a lip stick.

If you have both, they do not compete for the same slot. Sunflower makes the network; rice bran rounds it off. The wider field, with candelilla, carnauba and beeswax on the same measures, is in waxes compared.

What these numbers do not settle

The gel strength table is read by eye from a supplier chart. The readings are good to about 5 dmm, the chart does not state the cone, temperature or time, and the supplier sells the wax. Its ranking matches the independent studies; treat the figures as a shape, not a specification.

The independent studies were written about food oleogels or one stick cosmetic. They used soybean, canola, olive, rice bran, macadamia and other food oils, not a finished lip balm with butters, castor and pigment. No study found tested sunflower and rice bran wax side by side in a lip balm formula, so the use levels on this page are this site's bench starting points checked against the gel data, not measured balm results.

Both waxes vary by refiner. The Koster Keunen figures describe two products from one supplier; another supplier's sunflower or rice bran wax can sit outside them, and rice bran in particular can arrive darker, more acidic or with a different melting figure. Koster Keunen lists its sunflower wax as light yellow and its rice bran as yellow to light brown, and crude rice bran runs darker. Read the certificate of analysis for melting figure and method, acid value and colour, and test each new lot.

Reviewed and updated 28 October 2026. Spotted an error? Tell us and we will fix and log it.