
Candle-making is an art and a science, and one of the most important steps in the process is preparing your mould. There are several ways to plug a candle mould, including using a wick, putty or sticky tack, duct tape, or a rubber mould plug. One method is to string the wick through the hole at the bottom of the mould, ensuring there is enough wick at the end to ball up and seal the hole. This prevents wax from leaking out. Alternatively, you can use putty or sticky tack to seal the hole, or duct tape, ensuring there are no air pockets. Another method is to use a rubber mould plug, trimming the end so that the wick lays flat, before pressing it into the hole.
How to Plug a Candle Mold
| Characteristics | Values |
|---|---|
| Preparing the mold | Use a rubber mold plug or putty/sticky tack to seal the wick hole. |
| Wax temperature | Heat wax to 140-176°F (60-80°C). |
| Pouring | Pour slowly at an angle to avoid air bubbles. |
| Filling | Fill to the desired level, ensuring wax reaches all edges without overfilling. |
| Setting | Leave undisturbed in a cool, dry place for 3-24 hours. |
| Removing | Place in the freezer for 10 minutes to loosen, then push the candle out. |
| Trimming | Trim the wick to 1/2 inch from the wax surface. |
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What You'll Learn

Use a rubber mould plug to seal the wick hole
To plug a candle mould, one method involves using a rubber mould plug to seal the wick hole. This is a crucial step in the candle-making process, as it prevents the melted wax from leaking out. Here's a detailed guide on how to use a rubber mould plug effectively:
First, prepare the rubber mould plug by trimming a small portion from its end. This step ensures that your wick pin will lie flat against the mould. Next, turn the mould over and firmly press the plug into the wick hole. Apply enough force to create a tight seal, preventing any wax leakage.
Now, you can insert the wick by sliding the wick pin into the mould. Ensure that the wick is secure and centred, allowing for an even burn when the candle is lit. This process might vary slightly depending on the type of mould you're using.
For PVC moulds, cut the end of the wick at an angle to facilitate easier insertion. You want to have about a 2.5 cm or 1-inch overhang at both ends of the mould. After inserting the wick, use blu-tack or putty to further seal the wick hole and prevent leakage.
If you're working with silicone moulds, the process is a bit different. Use a wicking needle to carefully thread the wick through the mould. If your silicone mould doesn't have a pre-made hole, create one at the centre before inserting the wick. Remember to keep the wick straight and secure with a wick holder.
By following these steps and using a rubber mould plug, you can effectively seal the wick hole and create beautifully crafted candles with a professional finish.
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Prepare a double boiler to melt the wax
Preparing a double boiler to melt wax for candle-making is a simple process. It is also one of the safest and most efficient ways to melt wax without burning it. Here is a step-by-step guide to preparing a double boiler:
Firstly, find a large pot or saucepan. This will serve as the base of your double boiler and will be filled with water. Fill the large pot or saucepan with around 1-2 inches of water. It is important not to fill the container too much, as you want to avoid the water touching the bowl or pot that will be placed on top. The water should be heated to a gentle simmer, not a boil, as this will ensure the wax melts evenly without overheating.
Next, you will need a heat-safe container such as a metal or glass bowl, a pouring pitcher, a clean coffee can, or a smaller saucepan. This will be placed on top of the large pot or saucepan and will hold your wax. Ensure that the container rests comfortably and does not touch the water. Place your wax inside the container.
Now, heat the wax over medium-low heat until it is completely melted. Stir the wax occasionally with a wooden or heat-safe spatula to ensure even melting. Use a thermometer to monitor the temperature, aiming to keep it between 160°F to 185°F to avoid burning.
Once the wax has reached the desired temperature, carefully remove the container from the heat. Be sure to use oven mitts or potholders to handle the hot container and avoid burns. Now you are ready to pour the wax into your candle mould!
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Add fragrance and dye to the wax
Adding fragrance and dye to your candle wax is a great way to make your candles unique and personalised. Here is a step-by-step guide to help you add fragrance and dye to your candle wax effectively:
Choose the Right Dye
Firstly, select the type of dye you want to use. Candle dye is a special kind of colourant that dissolves in wax. It is formulated to blend evenly with oil-based products such as wax. Candle dye typically comes in the form of dye chips, blocks, liquid dye, or flakes. Liquid dye can be added at any time after the wax has fully melted, but be cautious not to go too low or too high with the temperature. Dye chips/blocks melt smoothly around 160°-180° F, so test different temperatures within this range to find the best result.
Prepare a Double Boiler
Set up a double boiler by placing a heatproof bowl or a pouring pot on top of a pot filled with a few inches of water. Ensure the bowl does not touch the water. This indirect heat source will melt the wax evenly without overheating it.
Heat the Wax Gradually
Heat the wax gradually to a temperature of about 80°C/176°F. Use a thermometer for accuracy, especially when working with delicate waxes like soy.
Add Fragrance Oil First
Before adding the dye, add your chosen fragrance oil to the melted wax. Always add the fragrance oil first as it can affect the chemical makeup of the colourant. Additionally, adding fragrance oil after the colourant can cause major colour changes and discoloration.
Add Dye Gradually
Introduce the dye slowly into the melted wax, stirring constantly. The amount of dye needed depends on the type of colourant and wax used. For liquid dye, start with 1-2 drops, whereas for dye blocks, start with ¼ - ½ a block per pound of wax. You can create custom colours by blending different colours together, but always test each combination thoroughly.
Monitor Temperature
Ensure the wax is not too hot before pouring. A good pouring temperature is usually around 75°C/167°F, depending on the wax type.
Remember to always research the products you are using to ensure the best and safest results. Enjoy crafting your unique, fragrant candles!
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Pour the wax into the mould slowly and at an angle
When pouring the wax, it's important to go slowly and at an angle to avoid air bubbles and unevenness in your candle. Start by pouring the wax slowly and steadily into the mould at a slight angle, targeting one side of the mould first. This helps to create a smooth and even layer, reducing the risk of air bubbles forming. As you pour, slowly move the wax container across the top of the mould, ensuring an even distribution. This technique will help to direct the flow of wax and minimise splashing, which can cause air bubbles and uneven cooling.
Maintaining a slow and controlled pour is crucial. If you pour too quickly, the wax will not have time to settle and adhere to the sides of the mould, increasing the likelihood of air bubbles and an uneven surface. By pouring at an angle, you can better guide the flow of wax and ensure it coats the sides of the mould evenly. This is especially important if your mould has intricate details or shapes that you want to capture accurately.
As you reach the end of the pour, continue to tilt the container as you slowly bring it back towards the centre of the mould. This will help to avoid any sudden changes in the flow of wax, which could create air bubbles or disrupt the smooth surface you're aiming for. Once you've finished pouring, use a heat gun or hairdryer on a low setting to apply gentle heat to the mould. This helps to melt any small wax droplets or splashes that may have occurred during the pouring process, ensuring a seamless finish.
Taking your time and adopting this slow and angled pouring technique will ensure your candle has a professional-looking finish. It may take a little longer, but the results will be well worth the extra care and attention. This method is especially important if you're creating candles with intricate designs or adding additional elements like colours or fragrances, as it ensures the integrity of your final product. With practice, you'll perfect the art of pouring wax and be able to consistently create beautiful and flawless candles.
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Remove the candle from the mould by freezing or warming it
Removing a candle from its mould can be a tricky process, and it is important to be patient and efficient. The first step is to remove the mould sealer. If you are using putty, simply peel it off. Magnetic mould sealers can be snapped off, but these are less common and are usually only used with metal moulds.
One way to remove the candle is to freeze the mould for 5-30 minutes. Then, quickly heat the mould with a heat gun and try to dislodge the candle. You can also try placing the mould in a water bath, ensuring the water level is below the top of the mould, and slowly heating the water. This method can help loosen the candle. If you are using a flexible silicone mould, you can turn it inside out or cut the side and seal it with a rubber band.
Another option is to warm the mould. Place the mould in a refrigerator or a cool room for a few minutes to allow the wax to harden. Then, place the mould in a metal dish filled with boiling water and wait for the candle to soften. Use tongs or a wooden spoon to remove the candle and avoid burning yourself.
If the candle is still stuck, try tapping the bottom of the mould to shake the candle loose. Flip the mould upside down and tap slowly and progressively, or the candle may slip out too quickly. You can also try lightly tugging on the wick.
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Frequently asked questions
To plug a candle mold, you will need to seal the wick hole to prevent wax from leaking out. You can do this by using a rubber mold plug, putty or sticky tack. If using a rubber mold plug, trim the end so that your wick pin will lay flat, then push it into the wick hole. If using putty or sticky tack, roll a piece into a ball, press it into the wick hole, and smooth out the edges to create a seal.
The ideal temperature for pouring wax into a candle mold is around 75°C/167°F, depending on the type of wax. It is important to heat the wax gradually and monitor the temperature with a thermometer, especially when working with delicate waxes like soy.
There are several methods to remove a candle from a mold. One method is to warm the mold with a heat gun and then slide the candle out. Another method is to freeze the mold and candle for about 30 minutes, then quickly heat the mold and try to dislodge the candle. Alternatively, you can place the mold in a water bath, slowly heat the water, and gently push the candle out.











































