How to Add Fragrance Oil to Wax Melts and Tarts

What a wax melt changes — and what it stubbornly does not

A scented candle releases fragrance from a small liquid pool kept hot by a flame. The rest of the wax sits solid and silent. A wax melt has no flame and no pool boundary: the cavity you drop into a warmer becomes liquid in its entirety, held at whatever temperature that warmer runs at. Everything that follows in this guide comes from that single difference.

What disappears is the entire wick problem. No wick size to match to a jar diameter, no tunnelling, no mushrooming, no soot, no drowned wick, no three-hour burn test to reach a full melt pool. If you have spent a season fighting wicks, melts feel like relief, and the relief is real — wick selection by diameter simply stops applying. What also disappears is the flame's heat. General candle-making practice is that an electric or tealight warmer holds the wax far cooler than a burning wick holds its pool, which is why melt ranges on fragrance pages sit above candle ranges rather than below them. CSI does not publish warmer temperatures, and neither does any honest supplier who does not make the warmer — so treat that as a mechanism, not a measurement.

What stays is everything to do with the oil. The oil is still dissolved into hot wax, still has a stated range on its page, still has a flash point that matters for handling and storage, still has vanillin in it or not, still needs time after pouring before it smells the way it will smell. And the wax still has a stated maximum load, because that maximum is about how much oil the wax structure can hold without letting it back out — a property of the wax, not of the wick.

One more thing stays, and it is the one that catches Indian makers: a candle lives inside a jar. A melt does not. A 100 g block of soy sitting in a courier bag in Nagpur in May has nothing but its own firmness holding it together, and the fragrance load you chose is one of the things that decides how firm it is. That is covered in full further down.

That last row is worth a number. A 200 g soy candle at 8% carries 16 g of oil in a 216 g pour — 7.4% of what the customer holds. A 100 g melt at 13% carries 13 g of oil in a 113 g pour — 11.5% of what the customer holds, in a product that usually sells for less. Fragrance is a larger slice of a melt's cost than of a candle's, which is exactly why the load decision below is worth getting right rather than copying from a video.

Why 15% on the oil page is usually not available to you

Of the 92 fragrance oils CSI lists, 28 publish a wax-melt figure separate from their candle figure. The pattern is consistent. Lavender, Roasted Coffee, Citrus Lemon, Apple Cinnamon and Woody Oud all print 6–10% for candles and 10–15% for melts. Japanese Cherry Blossom prints 6–13% for candles and 10–18% for melts, the widest pair in the collection. Sandalwood and Blue Ocean print up to 12% for melts. Autumn prints 9–13%, Fresh Strawberries and Pumpkin Spice 8–12%, Mahogany Teakwood and Coffee Vanilla Tobacco 8–10%.

Now read the other page. Luxury Soy Wax Chunks states up to 13% of total wax weight, with 8% as a starting point, 10% recommended and 13% the maximum to be test-burned thoroughly. Premium Coconut Soy CSI 468 also states up to 13%. Luxury Soy Wax CSI 464 states up to 10%. Those are the wax manufacturer's stated formulation maximums, and they do not have a melt clause.

So the rule for every recipe on this page: take the lower of the oil page's melt range and the wax page's stated ceiling. A 15% Lavender melt is a published figure on the Lavender page and is still not available to you in Chunks, because Chunks stops at 13%. The gap is not theoretical either — 15 g of Lavender per 100 g of wax is ₹78.32 against ₹67.87 at 13%, so the difference you cannot use is ₹10.44 of oil per melt you never needed to buy.

Sixty-four of the 92 oils print no melt figure at all. That is not a fault and it is not a hint — it simply means the page does not carry that number. For those oils, one of two honest positions applies: stay inside the candle range the page does print, or message CSI on WhatsApp and ask whether a melt figure exists for that composition. Gilli Mitti Patchouli is an interesting middle case: its page prints 6–10% across all wax types, melts included, so its melt figure is the same as its candle figure and there is nothing to raise.

Which CSI wax to use when there is no jar holding it together

CSI does not sell a wax labelled for melts, and this page is not going to pretend otherwise. What it sells is eight in-stock soy and soy-blend grades, of which two are realistic candidates and several are actively poor choices. The honest comparison is below.

The choice between the top two is a genuine trade-off and it costs almost nothing either way: 100 g of Soy Pillar Wax is ₹60.00 and 100 g of Luxury Soy Wax Chunks is ₹59.90. Ten paise per melt is not a decision. Release versus a published ceiling is.

If you want the published ceiling — because you are selling, because a customer asks, because you want a number you can point at — pour Chunks and accept that a wax formulated for excellent adhesion to glass will also adhere cheerfully to a clamshell. Chill the filled clamshell, flex the plastic, and it releases; a silicone mould releases more easily still. If you want the easy release and the clean shoulders on a shaped tart, pour Soy Pillar Wax and hold your load to the oil page's candle range until CSI gives you a figure on WhatsApp. Neither answer is wrong. Guessing a ceiling for the pillar wax would be.

The method: nine weighings and one two-minute stir

Two minutes is longer than it feels. Count it on a clock, not by instinct, and keep the motion slow and folding rather than fast and whipping — air beaten into soy at 85°C shows up later as a pitted surface. Bamboo Stirring Sticks are ₹118.00 for 5. The CSI Pro Mixer at ₹349.00 is described on its page as integrating fragrance oil into wax at 80–85°C and running 30–45 minutes of continuous mixing per charge; for melt batches, where you are often pouring many small cavities from one melt, that is the difference between a consistent first clamshell and a consistent fortieth.

Clamshells, moulds and what CSI actually stocks for melts

What CSI does stock for this format is the Wax Melts Containers Empty range: clamshells in Heart and Square, in packs of 5, 10, 50 and 100, at a flat ₹29.50 each at every pack size. The page describes them as heat-resistant plastic and tells you to pour melted wax in, add fragrance oils and colours, and let them cool. Packs of 5 and 10 are ₹147.50 and ₹295.00; a 50-pack is ₹1,475.00 and a 100-pack is ₹2,950.00. There is no volume break, so buy the pack size that matches your run rather than hunting a discount that is not there.

The page does not publish a fill weight per cavity or per clamshell, and this guide is not going to invent one. That is a five-minute problem to solve permanently: pour one clamshell full, let it set, weigh it, and you have the fill figure for every batch you will ever run in that shape. Write it on the inside of your cupboard door. Every costing on this page uses 100 g of wax as its unit precisely because your clamshell will hold what it holds.

Beyond clamshells, the mould side of the catalogue is thin for this purpose. The Ginger Bread Mould at ₹236.00 is a shaped mould that works for a novelty tart as well as a candle. The Aroma Wax Sachet Making Kit at ₹554.60 is the closest thing CSI sells to a melt starter: its page lists 250 g of Soy Pillar Wax, a wax sachet mould, jute twine, candle dye, dry flowers, a bamboo stirring spatula and a sandalwood fragrance oil. Wax sachets are the unwicked, unwarmed cousin of a melt — the same load logic applies, minus the warmer — and the kit is a cheap way to test whether the format sells in your market before you buy fifty clamshells. Silicone melt-mould trays are not in the CSI range at the time of writing; buy those locally and bring the wax and oil here.

Cure, packaging and the Indian summer problem

Cure first. Several CSI oil pages give 24 to 48 hours, and some give 48–72 hours for soy specifically. Treat that as the earliest point at which the product can be judged, not as the point at which it has finished changing — the Luxury Soy Wax Chunks page itself asks for a minimum of 48 hours and ideally 1 to 2 weeks. Standard practice for soy is 14 to 21 days depending on the fragrance family, and melts are not exempt: the same oil is dissolved in the same wax, doing the same slow settling. The 14-day cure argument and how cure time changes different fragrance families both apply unchanged.

The difference is where the cure happens. A candle cures in a jar with a lid on. A melt, if you leave the clamshell open, cures into the room — you will smell it beautifully for a fortnight and the customer will smell it less. Close the clamshell as soon as the surface has set hard enough not to deform, and store the closed shells somewhere dark and under 30°C if you can manage it.

Now the Indian part. Delhi, Ahmedabad and Nagpur routinely run past 40°C between April and June; a parcel sitting in a closed delivery van at midday is hotter than the street. A jarred candle survives that because the glass holds the shape even if the surface goes glossy. A melt has no glass. This is why Premium Coconut Soy CSI 468, whose page states a melting point of 50–53°C, is the wrong wax for a melt you intend to courier in May — it is a lovely container wax and the lowest published melting point in the CSI range is exactly the wrong property here. It is also why the load matters twice: once for scent, once for firmness.

One honest caveat on that table: the temperatures are India's, not CSI's laboratory. No CSI page publishes a softening point for a melt block, and the load-versus-firmness relationship is general candle-making practice rather than a measured figure. Which is precisely why the summer instruction is to test rather than to trust: pour three clamshells at 10%, 12% and 13%, leave them in a closed car for an afternoon in April, and you will have better data for your own market than any supplier can give you.

What a melt actually costs, and where the money goes

The unit for everything below is the one stated at the top: 100 g of wax, oil at the load named, one clamshell at ₹29.50, wax and oil priced at 1 kg packs. Labels, inserts, outer packaging and your time are not included, and neither is GST on the sale you make — CSI's prices are inclusive of taxes and CSI issues GST invoices on request, which matters when you are claiming input credit on a production run.

Read the spread. The cheapest melt on that table is ₹126.22 and the dearest is ₹177.40 — a difference of ₹51.18 driven entirely by the oil, even though the expensive one uses three fewer grams of it. Wax is ₹59.90 in every row and the clamshell is ₹29.50 in every row; together they are a fixed ₹89.40 floor. If you are pricing a melt range, the fragrance choice is the only lever that moves cost materially, and it moves it hard.

For comparison, a 200 g Luxury Soy Wax Chunks candle at 8% with the same Citrus Lemon and an Eco Candle Wick Thin (C1) at ₹5.90 costs ₹171.01 in materials before the jar. The melt is ₹126.22 with its packaging already included. That is the commercial case for the format in one line: melts let you put a fragrance in front of a customer at roughly half the material cost of a candle, with no wick to get wrong.

A last word on trial sizes. Most CSI oils sell in 15 gm and 50 gm packs as well as kilos, and a 15 gm pack is roughly one melt at 13% plus a little spare. Buying four 15 gm oils and pouring four single clamshells is a genuinely cheap way to find out which scents your market wants in this format before you commit to a kilo. The per-gram rate on a 15 gm pack is much higher than at 1 kg — Citrus Lemon is ₹5.43/g at 15 gm against ₹2.83/g at 1 kg — and that premium is the cheapest research you will buy all year.

Frequently asked questions