Best Pouring Temperature for Soy Wax Candles

The pour temperature for every CSI soy grade

“Soy wax” covers waxes that behave very differently in the jug. A coconut-soy blend such as Premium Coconut Soy CSI 468 has a stated melting point of 50–53°C and is poured at 58–60°C. A container soy flake such as Luxury Soy Wax CSI 464 is worked at 80–90°C. Between the coolest and warmest published figures there are 32°C. That is not disagreement between product pages; it is two different materials. A pour temperature is always relative to where that particular wax starts to set, which is why a number borrowed from a video, a forum thread or a different supplier’s wax is a number for somebody else’s wax.

The table below gives every figure CSI publishes for its soy and soy-blend grades, exactly as the product pages state them. Where a page does not publish a pour or fragrance-add temperature, the table says so. We do not fill those gaps with a guess — ask for the figure on WhatsApp before your first pour with that grade.

Three things in that table matter more than they first appear. First, Luxury Soy Wax Chunks is the only grade with both a published add range and a separate, lower pour range, so it is the only one where you must deliberately let the wax fall before pouring. Second, the CSI 464 page covers melting and pouring with a single 80–90°C working range, so there is no waiting step at all: once the oil is stirred in and the wax sits inside that range, pour. Third, the Eco Soy CSI 400 page does not give a number for the pour — its instruction is to add fragrance at 85°C, stir gently for 2 minutes and pour directly. Your pour temperature for CSI 400 is simply whatever the wax reads when that stir ends, which in an open jug is usually a little below where you added it. Measure yours once so you know.

What the pour temperature decides — in the jar, not the jug

Once the fragrance is stirred in, the pour temperature no longer affects the jug very much. It affects what happens in the jar over the next few hours. Three things change when you pour at the hotter or cooler end of a window, and none of them needs crystal chemistry to understand.

How long the wax stays liquid. A hotter pour has more heat to shed before it sets, like a glass of chai poured straight off the boil against one that has stood for five minutes. Longer liquid time means more time for the wick to drift, for air to rise and for a warm room to slow the set further. How far it pulls in. Wax contracts as it cools and solidifies. The more cooling that happens between pour and set, the more it contracts, and it pulls in last where it sets last — usually around the wick, in the centre. How it meets the glass. Wax that arrives much hotter than the jar behaves differently at the glass from wax that arrives only a little warmer; a very cold jar makes wax set on contact, while a large temperature gap followed by a long shrink gives the wax more chance to release from the wall.

This is general candle-making practice rather than a CSI measurement, and it is enough to explain why a few degrees change the finished top. Soy is known among makers for being sensitive to how quickly it cools, which is why the published windows are narrow: 5°C for Luxury Soy Wax Chunks and 2°C for Premium Coconut Soy CSI 468. The CSI 464 working range is wider at 10°C, which is one reason makers who are new to temperature control often find it forgiving.

Treat that table as a reading guide, not a diagnosis. Several of those symptoms have causes that have nothing to do with the thermometer — dirty glass, draughts, the wrong wick, storage — and a hot or cold pour often shows two or three symptoms together rather than one. For more on the two defects makers ask about most, see why candles get wet spots and sinkholes and why soy wax frosts; for cracks across the top, why candle wax cracks on top. What this page gives you is the temperature half of the answer and a way to adjust it cleanly.

From fragrance add to pour: managing the drop

The Luxury Soy Wax Chunks page says to melt to approximately 80–85°C, add fragrance at 80–90°C with a slow 2-minute stir, and pour at 75–80°C. Read together, those instructions give you a choice. Add at the bottom of the add range and the wax is at the top of the pour range already; add at the top and it has to come down by 10–15°C first. Neither is wrong. The right choice depends on how many jars you pour from one jug. (Why the add range sits where it does is a separate question; the best temperature for adding fragrance oil to soy wax covers it.)

The case for adding hotter is the row. A jug keeps cooling while you pour, so the first jar and the tenth jar do not go in at the same temperature. Start the row at the top of the window and you have all 5°C to work through before the jug drops out. The case for adding at 80°C is a small test pour: two or three jars, no waiting, and the wax is already where it needs to be.

For CSI 464 there is no drop to manage, because its page covers melting and pouring with one working range. Stir the oil in and pour while the wax reads between 80°C and 90°C. For CSI 468 the drop is the largest of the three from wherever you add, and the target is only 2°C wide, so give it time and read often rather than trying to hurry it. For Eco Soy CSI 400, follow the page: add at 85°C, stir gently for 2 minutes and pour directly.

Map your own jug once — with no candles at stake

If you want a second opinion on how long soy wax should rest in the jug before pouring, how long soy wax should cool before pouring is a useful companion — but trust your own card over any general figure, because your jug, your batch size and your room decide the real number.

Adjusting inside the window for Indian rooms and seasons

Hot wax loses heat at a rate roughly proportional to the gap between its own temperature and the air around it. That is general physics, and it is a good enough approximation to explain why Indian makers see their tops change with the season while the thermometer reads exactly the same. A small gap means slow early cooling. A large gap means fast early cooling. The table puts numbers on it for the two grades with the most exact published pour figures.

Read the bottom row carefully. In a 40°C room, Luxury Soy Wax Chunks poured at 78°C starts cooling about 30% more slowly than in an air-conditioned room. Premium Coconut Soy CSI 468 poured at 59°C starts cooling about 46% more slowly — it has only 19°C of gap to work with, barely 54% of what it gets at 24°C. A coconut-soy candle poured in a North Indian summer afternoon stays liquid and soft far longer than the same candle poured in December. In an unheated winter workshop at 12°C the effect runs the other way: the Chunks pour starts cooling about 22% faster, and cold glass sets the outer wax almost on contact.

The published window does not move with the weather, and you should not leave it. What moves is where inside it you aim. General practice among soy makers is simple: in a hot room, work toward the cooler end so the wax has less heat to lose in air that cannot take it away quickly; in a cold room, work toward the warmer end and make sure the jars are not colder than the room. The starting points below are CSI’s suggestions, not product-page figures. Use them for your first bracket test and then trust your own results.

Two Indian situations deserve their own note. Monsoon humidity does not change the pour number, but jars carried from an air-conditioned room into humid air can collect a film of condensation — wipe and dry them before the wax goes in. Power cuts are the other. If the melter goes off halfway through a row and the jug drops below the window, do not pour the last jars “to finish the jug”. Return the wax to the melter, bring it back into range, stir, re-read and carry on. A jar poured 5°C below the window costs more to fix than the few minutes of re-warming.

Measuring pour temperature so the number means something

In an open jug the wax is not one temperature. The surface loses heat to the air, the wax against the wall follows the temperature of the jug, and the middle lags behind both. A reading taken at the top of a still jug can sit several degrees away from the wax that actually goes into the jar. The fix costs nothing: stir gently first, put the tip into the middle of the wax without touching the base or the wall, wait for the display to settle, and read. Then read again just before the first jar and again partway through a row. A Pen Thermometer at ₹354.00 is enough; choosing a candle thermometer covers the options.

An infrared gun reads the surface skin, which runs cooler than the middle — the Mini Electric Wax Melter page suggests an infrared or pen thermometer, and either works if you stir first and aim at freshly stirred wax. What does not work is reading the melter. The Mini Electric Wax Melter page describes Gear I as approximately 70–85°C and Gear II as reaching up to 100–120°C: those are heating settings, not pour readings. The Electric Wax Melter (Imported) page states a display range of 60–100°C with a ±10°C deviation, so a set point of 80°C can mean anywhere from 70°C to 90°C in the wax. That 20°C span is 4 times the whole Chunks pour window and 10 times the CSI 468 window. Set the melter by its display; pour by the thermometer.

Check the thermometer itself before a big production run. If its range reaches that low, a probe standing in a glass packed with crushed ice and a little water should read close to 0°C; if it is several degrees out there, it is several degrees out at 78°C too, and on a 2°C window that decides the batch. Replace a thermometer that disagrees with a second one by more than a degree or two — a ₹354.00 part should not decide the fate of a festive order.

The three-jar bracket test: find your number in one pour

A bracket test pours three jars from one scented melt at the top, middle and bottom of the published window, and changes nothing else. Because the jug falls as you pour, the order takes care of itself: pour the top jar first, stir and wait for the middle, then the bottom. It costs three candles and one afternoon, and it replaces a season of guessing. With 200 g of wax, 16 g of Eucalyptus Spearmint Fragrance Oil at 1 kg pricing and an Eco Candle Wick C1 per jar, the materials cost is as follows (jars excluded).

Two notes on that table. For CSI 468 the steps are only 1°C apart, which is only meaningful if your thermometer reads to a whole degree and agrees with a second one; if it does not, pour jars A and C only and add a third jar that changes something else, such as a room-temperature jar against a slightly warmed one. For Eco Soy CSI 400 the page ties the pour to the end of the add-and-stir, so the bracket moves the add temperature inside its published 80–90°C range rather than the pour.

If you pour this week, the timeline works out neatly: pour the bracket on 12 September, score it on 13 September, score bloom on 19 September and burn-test on 26 September. That leaves the first half of October for production, which is where the festive calendar needs it.

Holding the pour window through a festive production day

From today, 11 September, to 15 October there are 34 days. A candle poured on 15 October and cured for 21 days is ready on 5 November, three days before Diwali on 8 November 2026 — so mid-October really is the last sensible production day for candles that still have to be packed and shipped. That makes the pour window a production problem, not just a quality one: every row poured outside it becomes a remelt on a day when you have none to spare.

Fill the jug to the row, not to the brim. Use the minutes from your jug map: if the steel pitcher holds the Chunks window for a given number of minutes in your room, fill only as much as you can pour in that time. Stir between jars and read every four or five. Pour the row in order and keep it in order — mark the first and last jar of each jug fill, because if the tops differ along a row the cause is almost always temperature drift across the pour, and the markings prove it. Stop at the bottom of the window. The last two jars of a jug are the ones most often poured cold because nobody wants to re-warm a small amount; re-warm it anyway.

Keep a pour log. Five columns are enough: jug fill number, jar numbers, thermometer reading before the first and last jar, room temperature, and the 24-hour top score. After a week of production you will see your own pattern — which fills ran hot, which afternoon ran slow — and you will be adjusting from evidence rather than memory. For the wider process around the pour, making soy candles step by step and getting smooth, crack-free soy candles fill in the rest; for keeping wicks upright while the wax sets, see keeping the wick straight.

A last word on buying. If your tops are poor, the instinct is to blame the wax and try another grade. Do the bracket first. A grade change resets every number on your bench card — pour, add, cure — and if the real cause was a 40°C room or a thermometer reading the surface, the new wax will show the same fault at a different temperature. Change grades when a bracket test in your own room says the window you have cannot give you a clean top; that is a much rarer result than it feels like at 11 p.m. with a cratered jar in your hand. Cure still matters after all of this — why candles need a 14-day cure explains why the burn test comes last.

Frequently asked questions