
Candles cracking around the container is a common issue for candle makers. This is often caused by cooling the candles too quickly, which can be the result of the room being too cold or the candles being placed in a fridge or freezer. To avoid this, candles should be cooled at a steady room temperature of around 18–20°C. The size of the container also matters, as larger containers will crack more easily than smaller ones. To prevent cracks, you can pre-heat your candle vessels to slow down the cooling process. It's also important to pour the wax slowly to avoid trapping air bubbles, which can cause uneven cooling and lead to cracks.
How to Avoid Candle Cracks
| Characteristics | Values |
|---|---|
| Wax temperature | Should be between 155-160°F (68-71°C) |
| Pouring technique | Pour slowly to avoid trapping air bubbles |
| Container coating | Use coconut or natural oil to prevent wax from sticking to the sides |
| Stirring | Stir slowly and smoothly to avoid creating air bubbles |
| Cooling | Cool at room temperature (18-20°C) |
| Distance between containers | Keep containers 2-3 inches apart to avoid trapping heat |
| Elevation | Elevate containers with a wire rack or towel to cool from the bottom up |
| Airflow | Ensure even airflow under the candles |
| Re-heating | Use a heat gun to melt the surface and fill cracks |
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What You'll Learn
- Ensure your candle cools at a steady room temperature of 18-20°C
- Avoid pouring wax too quickly to prevent air bubbles from forming
- Keep candle containers 2-3 inches apart to avoid uneven cooling
- Smooth stirring prevents air bubbles from forming during the cooling process
- Coat the container with coconut oil to prevent wax from sticking to the sides

Ensure your candle cools at a steady room temperature of 18-20°C
To avoid cracks in your candles, it is important to ensure they cool at a steady room temperature of 18–20°C. Here are several ways to achieve this:
Firstly, maintain a consistent room temperature by avoiding any drafts or temperature fluctuations. Ensure the room is warm and comfortable, ideally between 22–25°C, especially during the pouring process. You can turn on a heater an hour or two before pouring to create an optimal environment. This is crucial in colder months when there are significant temperature differences between daytime and nighttime.
Secondly, elevate your candles on a wire rack or a warm towel during the cooling process. This promotes even airflow underneath, preventing uneven cooling that can lead to cracks. It is also recommended to keep a distance of 2–3 inches between candle containers to avoid trapping heat.
Additionally, consider using a water bath to control the cooling temperature. Fill a container three-quarters full with water at a temperature no cooler than 15°C. Place your candle mould inside, weighing it down to keep it steady. This method speeds up cooling time and improves the surface appearance of the wax.
Another technique is to use a refrigerator to cool the candles. Allow the candles to harden at room temperature first, then place them in the fridge. This will firm up the candles while keeping them slightly warm, making it easier to release them from the moulds.
Finally, if you are making soy candles, be aware that soy wax shrinks while cooling, which can cause holes and dents in the container. To avoid this, use a candle thermometer to monitor the wax temperature and pour when it reaches a smooth consistency.
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Avoid pouring wax too quickly to prevent air bubbles from forming
When making candles, it is important to pour the wax slowly to prevent air bubbles from forming. Air bubbles can form when wax cools too quickly, or when it is poured too fast into the moulds. Thus, it is recommended to pour the wax slowly and steadily.
One way to ensure a slow pour is to use a pouring pot. This helps you control the flow of wax and prevents it from being poured too quickly. Additionally, you can pre-heat the moulds before pouring to slow down the cooling process.
Another technique to prevent air bubbles is to tap the mould gently while the wax is still liquid. This helps to release any air bubbles that may have formed. You can also try pouring the wax at a slight angle, slowly filling the mould until you need to straighten it up.
It is also important to be mindful of the temperature of the wax. Vigorous stirring or excessive stirring can create small air bubbles, which get trapped during the cooling process. Stirring slowly and smoothly can help prevent air bubbles from forming. Additionally, make sure to pour the wax at the right temperature. The ideal temperature will allow the wax to cool slowly and evenly, reducing the likelihood of imperfections.
By following these tips and pouring the wax slowly, you can help prevent air bubbles from forming and create smooth and even candles.
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Keep candle containers 2-3 inches apart to avoid uneven cooling
When making candles, it's important to keep candle containers 2-3 inches apart to avoid uneven cooling, which can lead to cracks in the wax. This is especially important when using glass containers, as they are more susceptible to heat retention and can cause the wax to cool unevenly, resulting in cracks.
To ensure even cooling, it is recommended to elevate the candle containers with a wire rack or a towel and cool them from the bottom up. This allows for better airflow, which helps to maintain a consistent temperature during the cooling process.
Additionally, it is crucial to pour the wax slowly to prevent air bubbles from forming. Air bubbles can expand and contract during cooling, causing cracks in the wax. Stirring the wax smoothly and slowly can also help to minimize air bubbles and create a more uniform texture.
Another factor to consider is the temperature of the wax when pouring. If the wax is too hot, it can cause the container to heat up excessively, leading to uneven cooling and possible cracking. Using a candle thermometer can help ensure that the wax is poured at the appropriate temperature, reducing the risk of cracks.
By following these guidelines, such as maintaining a safe distance between candle containers, controlling airflow, and pouring wax at the right temperature, you can significantly reduce the chances of your candles cracking around the container.
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Smooth stirring prevents air bubbles from forming during the cooling process
When making candles, it's important to be mindful of the stirring process to prevent air bubbles from forming during the cooling process. Excessive or vigorous stirring can create small air bubbles, which then get trapped during the cooling process. These air bubbles can lead to cracks in your candles as the holes become smaller and smaller, causing the candle to burst.
To avoid this issue, it's recommended to stir your wax smoothly and slowly. Stirring too fast has no benefit and will only result in a messy outcome. By maintaining a slow and gentle stirring motion, you can prevent the formation of air bubbles and ensure a more even cooling process.
Additionally, you can take extra precautions by using a pouring pot to control the speed of your pour. Pouring the wax too quickly can also trap air bubbles in the candle, making it harder to cool evenly. Taking the time to pour slowly gives the wax a better chance to settle and reduces the likelihood of imperfections.
Another technique to prevent air bubbles is to elevate your candles during the cooling process. Place them on a wire rack or a towel, and ensure a distance of 2-3 inches between each candle. This setup promotes even airflow, allowing the candles to cool uniformly.
Finally, it's crucial to work with patience and attention to detail. Candle-making requires precision in temperature control and pouring techniques. By taking the time to understand the properties of your wax and following recommended procedures, you can create beautiful, crack-free candles.
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Coat the container with coconut oil to prevent wax from sticking to the sides
Coating the container with coconut oil is a great way to prevent wax from sticking to the sides. This method is especially useful for beeswax candles. The oil creates a barrier between the wax and the container, allowing the wax to expand and contract during temperature changes without pulling away from the sides.
To coat your container with coconut oil, start by measuring out your coconut oil. The ratio of coconut oil to wax is important and can vary depending on your preference. Some candle makers use a 50:50 ratio of beeswax to coconut oil, while others use 1 cup of coconut oil to 1 kg of wax.
Next, prepare your container by cleaning it thoroughly. Any residue or moisture on the container can affect the adhesion of the wax. You can clean your container with dish soap, white vinegar, and hot water. Ensure the container is completely dry before proceeding. You can rest the container upside down on a towel or use a heat gun to accelerate the drying process.
Once your container is clean and dry, apply the coconut oil. You can use a brush or your fingers to coat the inside of the container evenly. Be sure to get a nice, even coat, covering all the surfaces that will come into contact with the wax.
After coating the container, you can proceed with your candle-making process. Prepare your wax and fragrance, and be sure to maintain the proper temperature for pouring. Pour your wax slowly and steadily, centering the wick as you go. Allow the candle to cool naturally, and enjoy your beautiful, crack-free creation!
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Frequently asked questions
To avoid cracks, you should cool your candles at a steady room temperature of around 18-20°C. You can also pre-heat your candle containers before pouring to help slow down the cooling process.
To ensure even cooling, keep a distance of 2-4 inches between each candle. Elevate them with a wire rack or a towel underneath and cool from the bottom up. You can also place a cardboard box upside down over them to help insulate.
Pouring at a lower temperature can help to reduce cracks. The ideal temperature for pouring wax is around 155-160°F, but you should not exceed 170°F on your first pour.
You should always stir your wax as smoothly as possible and pour slowly to avoid trapping air bubbles. You can also coat your container with coconut oil or another natural oil to prevent the wax from sticking to the sides.











































