I Have 200 Sweating Candles Made at 10% Fragrance — Should I Remelt Them and Dilute the Batch With Additional Wax?

Why dilution is the first rescue to consider

Two hundred candles weeping fragrance oil is a batch you cannot ship. Before you scrap it, look at what is inside each jar. At 10% of a 200 g candle you have 180 g of wax and 20 g of oil. If the cause is simply too much oil for this wax, the fix is not removing oil — you cannot pull it back out — but adding unscented wax until each gram of wax is asked to hold less.

Check the basis first, because it explains why the batch is sweating. Your 10% is a share of the whole candle. Wax pages, including CSI 464's, state their fragrance figure as a share of wax weight. On that basis your candle carries 20 ÷ 180 = 11.11%. Against that, the CSI 464 product page gives 'up to 10%'. So the batch is above the wax's stated ceiling before you even consider the particular oil. Dilution is aimed at a real overload, not a guess.

That is also why we will argue for less of our own oil here. Many makers find their throw at 8% is as good as at 10% once the candle is wicked correctly, and the candle that stays dry is the only one that sells.

The dilution maths for 200 candles

Use the standard rework formula. Oil in the batch equals batch weight multiplied by the current load. Target batch weight equals oil divided by the target load. Wax to add is the difference between the target batch weight and what you have.

The same arithmetic gives the other options. Choose your target before you buy wax, because the further you dilute, the more jars you have to fill.

The 9% row is tempting because it adds the least wax. It also leaves the wax holding 9.89% of its own weight in oil — right against CSI 464's stated ceiling, with the same oil that has already shown it will not stay put at 11.11%. If you test 9%, test 8% beside it. The 7% row adds more margin and more candles; whether its throw is acceptable is a burn-test question, not an arithmetic one.

What the 8% rework adds to your bill

Dilution is not free. Here is the material bill for the 8% route at CSI's live prices, for a batch poured in CSI 464 in 200 ml matte glass jars with Eco C1 wicks. Treat these as example figures for that set-up.

That excludes packaging, labels, labour, energy, shipping and GST, and it assumes your original 200 jars come back clean and undamaged. Remove chipped or cracked glass from production. If you would rather not hold 250 candles of this scent, the extra wax still has to go somewhere; diluting part of the batch to a different target, or pouring part of it into a different size, changes the arithmetic and the testing.

When dilution is the wrong rescue

Dilution fixes one cause: too much oil for the wax. It does nothing for the others, and in some cases it makes the problem bigger by spreading it across more jars.

Getting the wax back out of 200 jars

The arithmetic assumes 40,000 g comes back. In practice, recovery is a production job of its own, and the way you do it affects both the yield and the safety of the rework.

Warm the candles gently so the wax releases from the glass rather than chipping at it. A supervised warm room or a water bath around the jars works; a direct flame under glass does not. Lift out the wax plug, pull the wick and its tab, and scrape the residue. Strain the melted wax through a fine mesh to catch wick fibres and debris before it goes into the dilution pot.

Then weigh. If 200 jars give you 39,400 g rather than 40,000 g, the oil you are working with is 39,400 × 0.10 = 3,940 g, and the 8% target becomes 3,940 ÷ 0.08 = 49,250 g — so 9,850 g of wax, not 10,000 g. That is a small difference here and a large one on bigger batches. Always dilute the weight you have.

Inspect every jar after cleaning. Any chip, crack or flaw at the rim or base goes out of production as a general safety principle; a jar that has been through two heating cycles deserves a careful look. Wash off the oily film thoroughly, because residual fragrance oil on the glass can affect how the new wax adheres.

Run the pilot, then decide

Take ten candles from the batch. Remelt them gently, keep the melt below the oil's published flashpoint, and mind the hot wax. Weigh what you recover — it will be a little under 2,000 g — and dilute that weight, not the theoretical figure, to 8%. Stir thoroughly, pour, and record temperatures.

Cure the pilot for at least the oil page's stated minimum. Then split it: some for burn tests with the old wick and one size up, some in normal storage, some in a supervised warm room or cabinet at a test temperature you choose and label as your own. Never use a kitchen oven, a stove or anything near a flame for heat testing, and never leave a test burn unattended.

If the pilot stays dry, burns cleanly and throws acceptably, remelt the remaining candles and pour the full batch to the same written process. If it sweats again, you have saved yourself 10 kg of wax, 50 jars and 250 wicks, and learned that the oil or the wax has to change.

Either way, rewrite the formula before the next production run. The candles you make next week should not need rescuing.

Where this page fits

CSI already has guides that cover parts of this question. This page answers one sweating decision; these cover the neighbouring questions:

Three things to buy for this fix

Frequently asked questions