Why Is My Soy Wax Not Hardening? Troubleshoot Now!

Are you a candle maker struggling with soy wax candles that just won’t harden despite enough heat? You’re not alone. Many candle makers face this issue, and it can be frustrating when your beautiful candle sets don’t turn out the way you envisioned them. If you want a stronger hot throw and a longer-lasting flame, consider adding paraffin to your wax blend.

The truth is, troubleshooting soy wax candle issues is crucial for any candle maker who wants to create high-quality soy candles. Possible causes of soy wax candles not hardening include the type of wick used, temperature control during the making process, humidity levels in your workspace, and the addition of paraffin. To fix this issue, place the candles in a warm oven to ensure enough heat is applied.

As a candle maker, it’s crucial to understand the possible causes of softness in your soy wax candles. For instance, using a wick that’s too small or too large for your candle can result in uneven burning and poor hardness. Similarly, if you don’t heat your soy wax correctly or pour it at the wrong temperature during the manufacturing process, you risk ending up with soft or lumpy candles. Adding paraffin to your wax blend can also affect the hardness of your candles. Additionally, ensuring that the flame is not too large can help maintain the hardness of your candles over time.

In this troubleshooting guide on soy wax candle issues, we’ll explore some common possible causes that lead to problems when making soy candles and provide practical possible solutions on how to solve them. Whether you’re new to candle making or an experienced pro looking for ways to improve your craft, this guide will help you create beautiful and long-lasting soy wax candles that have a steady flame everyone will love. So let’s get started!

Possible Causes of Soy Wax Not Hardening

Insufficient Wax-to-Oil Ratio

One possible cause of frosting in soy wax candles is the presence of vanillin. Vanillin is a common ingredient in fragrance oils, but it can cause discoloration and frosting in candles. In addition, an incorrect wax-to-oil ratio can also contribute to frosting. It’s important to use the correct amount of oil and wax to ensure that the candle sets properly. Another factor that can affect the setting of soy wax candles is the wick. A wick that is too small or too large for the candle can result in uneven burning and incomplete hardening.

To avoid possible causes of frosting, be sure to follow a recipe that includes specific measurements for both the soy waxes and oil. Avoid adding extra oil or reducing the amount of soy wax called for in the recipe as this can lead to a soft, greasy candle that doesn’t burn well. Additionally, make sure to use enough heat during the melting process to ensure proper blending.

Overheating Soy Wax

Possible causes of poor adhesion and a soft texture in soy wax candles include overheating during the melting process, incorrect pour temperature, and high levels of vanillin. It’s important to avoid overheating soy wax, which has a lower melting point than other waxes, and to choose an appropriate candle wick for optimal burning performance.

When heating soy wax on a stove or hot plate, use low heat and stir frequently until it melts completely. Avoid using high heat or leaving the pot unattended as this can cause overheating and affect the quality of your candles. Make sure to check the pour temperature before pouring the wax into the container and insert the wick immediately after pouring. Watch out for smoke and adjust the heat accordingly to prevent frosting on the surface of the candle.

Adding Too Much Fragrance Oil or Dye

Adding excessive amounts of fragrance oil or dye can lead to frosting, affecting the soy wax’s ability to harden properly. This can cause problems with the wick and result in smoke. While fragrance oils and dyes are essential components of scented candles, possible solutions include using less or finding alternative options to prevent these issues.

To avoid this issue when making soy wax candles, use only as much fragrance oil as recommended by your supplier (usually 6-10% of total weight) and add dye sparingly until you achieve your desired color intensity. Be sure to stir thoroughly after each addition to ensure even distribution throughout the soy candle wax mixture. Also, make sure to choose the right size and type of candle wick for your soy wax candle.

Using an Unsuitable Wick Size for The Container

Using an unsuitable wick size for your container can result in poor wax hardening and possible frosting, which can lead to smoke during burning. The size of wick you choose depends on several factors including the diameter of your container, the type of wax you’re using, and the desired burn time of your candle. It is important to consider these factors to ensure a satisfied customer.

If you use a wick that’s too small, your candle may not burn hot enough to melt all the wax around it, causing frosting and smoke. If you use a wick that’s too large, your candle may burn too hot and cause the wax to melt too quickly, leading to possible solutions such as trimming the wick or using a different size. To find the right wick size for your container, consult with a supplier or use an online calculator to determine the appropriate size based on your specific needs and to ensure customer satisfaction.

Soy Wax That Has Been Stored for Too Long or Exposed to High Temperatures

Soy wax that has been stored for too long or exposed to high temperatures may not harden properly, causing frosting on the surface of the candle and affecting the customer’s experience. Over time, soy wax can also absorb moisture from the air which can affect its ability to set correctly and impact the wick’s performance.

To avoid frosting on your candles and wick issues, store your soy wax in a cool dry place away from direct sunlight and moisture. Be sure to use up any old stock before purchasing new supplies and check for signs of spoilage such as discoloration or an off smell before using. If you encounter any problems, don’t hesitate to contact our customer service team for assistance.

Poor Fragrance Oil Mixture and Type

Too Much Fragrance Oil Can Prevent Soy Wax from Hardening

Soy wax is a popular choice for candle making because it is natural, renewable, and eco-friendly. However, it can be frustrating when you pour your soy wax into a container or mold, only to find that it never hardens properly. One possible reason for this issue is the fragrance oil mixture and type used in the candle making process. Another possible reason could be the wick used in the candle, which can affect the burn rate and cause frosting on the surface of the wax. It’s important to consider these factors to ensure customer satisfaction with your candles.

One common mistake that novice candle makers make is using too much fragrance oil. While it may be tempting to add more fragrance oil to achieve a stronger scent throw, adding too much can prevent the soy wax from hardening and cause frosting. This happens because fragrance oils are typically made up of liquid compounds that can interfere with the solidification process of soy wax and affect the wick’s performance.

To ensure your soy wax hardens properly and prevents frosting, you need to follow the recommended maximum fragrance oil load for your specific type of soybean oil. For example, if you are using 100% pure soybean oil, the recommended maximum fragrance load is typically around 10%. Exceeding this limit may result in an improper setting of the candle and may also affect the wick.

The Type of Fragrance Oil Used Can Affect Soy Wax’s Hardness

The type of fragrance oil used in a candle, along with the wick, also plays an important role in determining whether or not your soy wax will harden properly and avoid frosting. Some fragrances contain ingredients like vanillin that can impact the hardness of soy wax negatively. Vanillin is commonly found in vanilla-scented fragrances and has been known to cause discoloration and softening in candles made with natural waxes like soy.

To avoid issues with vanillin or other problematic ingredients found in certain fragrances, consider testing each new scent before using it extensively in your candles. You can do this by adding a small amount of the fragrance to a sample batch of soy wax and observing how well it sets over time. It is also important to test the fragrance’s compatibility with your frosting and wick materials before proceeding with full-scale candle production.

Exceeding the Maximum Fragrance Oil Load Can Cause Issues with Soy Wax Hardening

In addition to preventing soy wax from hardening, exceeding the maximum fragrance oil load can cause other issues in candle making. Adding too much fragrance oil to your soy wax can result in frosting on the surface of the candle or a wick that becomes unstable. This happens because the excess fragrance oil is unable to bind with the soy wax properly.

To avoid this issue when making wax melts or candles with paraffin wax, always measure your fragrance oils carefully and follow the recommended maximum load for your specific type of wax. If you have leftover wax, make sure to properly store it for future use. And don’t forget to choose the right wick size for your candles to ensure a clean burn. If you are unsure about how much fragrance oil to use or which wick size to choose, consult a reliable candle making guide or reach out to an experienced candle maker for advice.

Some Fragrances, Such as Those Containing Vanillin, Can Impact Soy Wax Hardness

As mentioned earlier, certain fragrances can impact the hardness of soy wax negatively due to their chemical composition. In addition to vanillin-containing fragrances, other scents like cinnamon and citrus may also cause problems with setting and hardness in candles made with natural waxes like soy. It’s important to note that using the wrong wick can also contribute to issues like frosting in soy wax candles.

If you want to use these types of fragrances in your candles but are worried about their impact on soy wax hardness and wick performance, consider blending them with other scents that are known to work well with natural waxes. For example, lavender and peppermint are both popular scents that tend to perform well in soy wax candles and can help prevent frosting on the surface of the candle.

The Scent Throw of a Fragrance Oil Mixture Can Be Affected by the Amount of Fragrance Oil Used

Finally, it’s worth noting that the amount of fragrance oil used in a candle or wax melts can also affect its scent throw. If you use too little fragrance oil in your candle or wax melts, it may not have a strong enough aroma when burned. On the other hand, if you use too much fragrance oil (as discussed earlier), your candle or wax melts may not set properly or may produce excessive soot when burned. Additionally, soy wax hardens differently than other waxes and can sometimes result in soy wax frosting. If you have leftover wax from making candles or wax melts, consider using it to make new ones rather than wasting it.

To find the right balance between scent throw and soy wax hardness, experiment with different fragrance oil loads until you find the perfect ratio for your specific type of soybean oil. Remember to always follow recommended guidelines and never exceed the maximum fragrance load for your chosen wax. Also, make sure to choose the right wick size for your candle to prevent frosting on the surface.

Air Bubbles in Wax: Why is My Soy Wax Not Hardening?

What are air bubbles in candle wax?

Air bubbles and frosting in candle wax are small pockets of air trapped within the wax that can cause various issues with the appearance and performance of your candles. These bubbles and frosting can occur during the pouring process or as a result of temperature changes during cooling. It is essential to ensure that your wick is properly centered to avoid these issues.

How do air bubbles affect candle quality?

If you’ve ever noticed frosting or an uneven wick on your candles, it could be due to air bubbles in the wax. As the candle cools, these pockets of air can expand and cause visible imperfections on the surface. When burned, carbon buildup and smoke may occur due to trapped air pockets within the wax.

To prevent tunneling and mushrooming while burning your candles, it’s essential to have a full melt pool. However, if there are holes or gaps in the wax caused by trapped air pockets or frosting, this can prevent a full melt pool from forming. It’s also important to ensure that the wick is properly centered to avoid uneven melting.

How can I avoid getting air bubbles in my soy wax?

There are several steps you can take to reduce the likelihood of getting air bubbles in your soy wax while ensuring a proper wick placement.

  1. Preheat your soy candle containers: By preheating your containers before pouring hot wax and wick into them, you can help reduce temperature differences that may cause bubbles to form.
  2. Pour slowly: Pouring too quickly could create turbulence that leads to more significant bubble formation, which can also cause wick displacement and soy wax frosting. It is essential to pour the candle wax slowly to avoid leftover wax and ensure a smooth finish.
  3. Use a heat gun: After pouring your soy wax candles, use a heat gun on low setting to remove any remaining bubbles or frosting on the surface. Ensure that the wick is properly centered before using the heat gun.
  4. Use a thermometer: Keeping track of temperatures throughout the melting and pouring process of candle wax, especially for soy wax candles, will help ensure consistency and minimize temperature fluctuations that may lead to bubble formation. Don’t forget to check the temperature of the wax around the wick to ensure proper adhesion and burning.
  5. Consider using additives: Some additives like stearic acid or Vybar 103 can help reduce bubble formation and improve overall candle quality. Additionally, selecting the right wick can greatly impact the performance of your candle.

By taking these steps, you’ll be well on your way to producing high-quality candles with a properly placed wick that are free from air bubbles and other imperfections.

Wax not heated well or enough

Insufficient heating can cause soy wax to not harden properly.

One of the most common reasons for soy wax not hardening is insufficient heating. If the temperature is too low, the wax will not fully melt and mix with the fragrance oils, resulting in an uneven distribution of scent and a soft texture that doesn’t solidify. Additionally, if the wick is too thick, it can prevent the wax from fully solidifying around it, leading to a less stable candle.

To prevent this from happening, it’s important to heat your wax to the correct temperature. The ideal temperature range for melting soy wax is between 170°F and 180°F (76°C-82°C). Any lower than this, and you risk not melting all of the wax completely. To ensure that your wax has melted completely, stir it gently while it heats up.

Using a heat gun or double boiler can help ensure that the wax is heated enough.

If you’re having trouble getting your soy wax to melt evenly, there are a few things you can do. First, try using a heat gun to warm up any areas that aren’t melting as quickly as others. This will help distribute heat more evenly throughout the container.

Another option is to use a double boiler. This involves placing your pouring pot inside another pot filled with water and heating them together on the stove. The boiling water will create steam which will gently heat your pouring pot without overheating it and causing hot spots in your wax.

Moisture, either from excess humidity or leftover wax, can also affect the hardening process.

Moisture can be another culprit. Excess humidity in the air can cause moisture to accumulate on surfaces within your workspace which then transfers into your soy wax when poured into containers. This excess moisture makes it harder for your soy candles or melts to cool down and solidify correctly.

Leftover bits of old candle waxes could also contain some amount of moisture content which may affect how the new wax will harden. Ensure that you clean out your pouring pot and any other utensils used before melting soy wax.

To prevent moisture from affecting your soy wax, keep your workspace as dry as possible. Use a dehumidifier if necessary, and wipe down all surfaces with a dry cloth before starting work. Also, ensure that you store your soy wax in an airtight container to prevent it from absorbing any excess moisture from the air.

Clean and Preheat Glass Containers

Why is it important to clean glass containers before use?

Cleaning glass containers before pouring wax into them is essential for several reasons. Firstly, leftover residue or dirt can mix with the wax, causing discoloration and impurities in the final product. Secondly, any foreign particles in the container can affect the way the wax adheres to it, leading to uneven burning or cracking of the candle. Lastly, cleaning your glass containers ensures that they are free of any unwanted scents or odors that may interfere with your fragrance.

To clean your glass containers with candle wax, start by washing them with warm water and dish soap. Rinse thoroughly and dry completely before use.

How do you preheat glass containers for soy wax?

Preheating glass containers before pouring soy wax into them is crucial for ensuring that the wax hardens correctly. To preheat your glass jars or containers, place them in a warm oven at 150-170°F (65-75°C) for 15-20 minutes. This process helps to eliminate any moisture inside the container that could cause problems during cooling.

It’s important not to overheat your jars as this can cause cracking or thermal shock when you pour hot wax into them.

Why should clear containers be used when making soy candles?

Using clear containers when making soy candles allows you to monitor how well your wax is cooling and hardening. As soy wax cools, it forms crystalline structures that are visible through clear glass jars. This process is called ‘curing’, and it usually takes around 24 hours.

If you notice any air pockets forming during cooling of candle wax, gently tap the jar on a flat surface to release trapped air bubbles.

What is the recommended pouring temperature for soy wax?

The recommended pouring temperature for soy wax varies depending on several factors such as jar size, room temperature, and production process. Generally speaking, most manufacturers recommend pouring soy wax at temperatures between 120-140°F (49-60°C).

Pouring wax at the correct temperature ensures that it adheres to the container and cools evenly, leading to a smooth finish.

How should soy wax be cooled after pouring?

After pouring your soy wax into the preheated glass container, allow it to cool at room temperature for several hours. Avoid moving or disturbing the jar during this time as it can cause uneven cooling and cracking.

If you need your candles to cool faster, you can place them in the refrigerator for a few minutes. However, be careful not to leave them in for too long as this can cause condensation to form on the surface of the candle.

What are some common reasons why soy wax doesn’t harden properly?

There are several reasons why soy wax may not harden correctly, including:

  • Pouring temperature: If you pour your wax at too high or too low temperatures, it may not adhere correctly to the container.
  • Cooling temperature: If your candles cool too quickly or too slowly, they may not harden correctly.
  • Container size: Using containers that are too large or small for your candle can affect how well it cools and hardens.
  • Moisture: Any moisture inside your candle wax container can cause problems during cooling and lead to uneven burning or cracking.
  • Air bubbles: Trapped air bubbles inside your candle can cause pockets of unmelted wax that prevent it from burning evenly.

By following these tips and tricks for cleaning and preheating glass containers before use, pouring at recommended temperatures, allowing proper cooling time with control over humidity levels while avoiding air bubbles forming during cooling process will help ensure that your soy candles turn out perfectly every time.

Troubleshooting Rough or Pitted Tops After Burning

Uneven Melting Causes Rough or Pitted Tops

One of the most common issues with soy wax candles is rough or pitted tops after burning. This can be frustrating, especially if you’ve put a lot of time and effort into making your candle. The good news is that this problem can usually be fixed with a few simple steps.

The main cause of rough or pitted tops is uneven melting during burning. Soy wax has a lower melting point than other types of wax, which means it can melt unevenly if not burned properly. This can result in pockets of unmelted wax, creating the rough or pitted appearance on the surface.

Burn Your Candle for At Least 2 Hours on the First Burn

To prevent rough or pitted tops from occurring, it’s important to give your candle a proper “memory burn” on its first use. This means burning the candle long enough to allow the entire surface to melt evenly.

For soy wax candles, it’s recommended to burn them for at least 2 hours on their first use. This will ensure that all of the wax melts evenly and prevents any pockets from forming in the future.

Trim Your Wick Before Each Burn

Another factor that can contribute to uneven melting and rough/pitted tops is an untrimmed wick. If your wick is too long, it can create excessive heat and cause uneven melting of the candle wax.

To prevent this, make sure to trim your wick before each burn to about ¼ inch in length. This will help control the flame and prevent any excess heat from causing problems with your candle’s surface.

Avoid Drafty Areas

Finally, another common cause of rough or pitted tops is placing your candle in a drafty area. A draft can cause uneven heating and cooling around your candle, resulting in an inconsistent melt pool and rough/pitted appearance.

To avoid this, make sure to place your candle in a still area away from any drafts. This will help ensure that the wax melts evenly and creates a smooth surface.

Addressing Soy Wax Frosting and Clumpy, Oily Wax Issues

Understanding Soy Wax Frosting

Soy wax frosting is a common issue that can affect the appearance of your candles. It appears as a white, powdery film on the surface of your candle, which can make it look unattractive to customers. This phenomenon occurs when the wax cools too slowly or too quickly during the cooling process. The frosting effect is not harmful to your candle’s performance but can be an eyesore.

Possible Solutions for Soy Wax Frosting

One possible solution to soy wax frosting is to add stearic acid to your wax mixture. Stearic acid acts as a hardening agent that helps prevent frosting from forming on your candles. You can add stearic acid at a ratio of 1-3% by weight of wax.

Another way to reduce soy wax frosting is by cooling your candles slowly and evenly. To do this, you should remove them from any heat sources and avoid exposing them to cold drafts or air conditioning units while they cool down.

Addressing Clumpy, Oily Wax Issues

Clumpy, oily wax can also be a problem when working with soy wax. This issue arises due to overheating the wax or using low-quality ingredients such as fragrance oils or dyes that contain impurities.

To address clumpy, oily wax issues, try using a double boiler method instead of direct heating on high heat. The double boiler method involves melting the soy wax in one container placed inside another container filled with water on low heat. This method allows for gentle heating and prevents overheating and burning of the wax.

It’s also essential to use high-quality fragrance oils and dyes that are specifically designed for use in soy wax candles. These products are made without impurities that can cause clumping and oiliness in your finished product.

No Guarantees for Perfect Tops Every Time

Despite taking all the necessary precautions, there are times when your soy wax candles will not harden as you expect them to. Unfortunately, there are no guarantees for perfect tops every time. However, by understanding some of the possible causes and solutions, you can increase your chances of success.

Possible Causes of Soy Wax Not Hardening

There are several reasons why your soy wax may not be hardening properly. It could be due to poor fragrance oil mixture and type, air bubbles in the wax, or the wax not being heated well or enough. It’s also important to make sure that you clean and preheat glass containers before pouring in the wax.

Troubleshooting Rough or Pitted Tops after Burning

If you notice rough or pitted tops on your candles after burning them, it could be due to issues with how they were poured or cooled. You may need to adjust your pouring technique or try using a different cooling method.

Addressing Frosting and Clumpy, Oily Wax Issues

Frosting is a common issue with soy wax candles that can make them look unattractive. To prevent frosting, try using a different type of soy wax or adding stearic acid to the mixture. Clumpy and oily wax can also be addressed by adjusting your pouring temperature and technique.


Q: Can I use any fragrance oil with my soy wax?

A: No, it’s important to use fragrance oils specifically designed for use with soy wax candles. Using other types of oils can result in poor scent throw and issues with candle performance.

Q: How long should I heat my soy wax before pouring?

A: The ideal heating time will depend on the type of soy wax you’re using and other factors like room temperature. Generally speaking, aim for around 170-180°F (76-82°C) before adding fragrance oil and pouring.

Q: Can I reuse leftover wax from failed candle attempts?

A: It’s generally not recommended to reuse wax from candles that did not turn out as expected. The wax may have absorbed moisture or other contaminants that can affect its performance in future candles.

Q: Do I need to use a specific type of wick with soy wax?

A: Yes, it’s important to choose a wick specifically designed for use with soy wax candles. Using the wrong type of wick can result in poor burn performance and safety issues.

Q: How do I prevent air bubbles in my soy wax candles?

A: To prevent air bubbles, try warming your glass containers before pouring in the wax. You can also tap the containers gently on a flat surface after pouring to release any trapped air bubbles.