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How to Get Rid of Epoxy Resin Bubbles: Tips for a Flawless Finish


At Magic Resin, we understand the frustration of discovering bubbles in your cured epoxy resin project. That's why we're here to help you learn how to get rid of epoxy resin bubbles and achieve a perfect, smooth finish every time. In this blog post, we'll cover various techniques and tips to banish those pesky bubbles.


1. Select the Right Epoxy Resin for Your Project

The first step in preventing bubbles is choosing the right epoxy resin for your project. Magic Resin offers a range of products tailored to different applications and pour depths. Choosing the appropriate product ensures optimal curing, reducing the chances of bubble formation.

Refer to our blog post "Selecting the Right Product and Managing Room Temperature" for guidance on which epoxy resin is best suited for your project.


2. Maintain an Optimal Room Temperature

The room temperature plays an important role in both preventing overheating and releasing bubbles. Ideally, you want to maintain a temperature of around 75°F from start to finish, as this allows bubbles to escape more easily.

If your pour requires a lower room temperature to prevent overheating, be aware that bubble release may be less efficient. In such cases, consider using a product with a higher recommended maximum pour depth to maintain the optimal 75°F temperature throughout the curing process. If needed, you can also use the layering technique.


3. Warm Your Epoxy Resin before Mixing

Warming your epoxy resin before mixing can help reduce bubbles. To do this, place the resin and hardener bottles in a plastic bag and immerse them in a warm water bath for 5-10 minutes. Make sure the water is hot but not boiling. The plastic bag keeps the labels intact and prevents water from entering the bottles. Be careful not to overheat the resin, as this can shorten its pot time.


4. Mix Your Epoxy Resin Gently and Thoroughly

When mixing epoxy resin, it's essential to be gentle and thorough to avoid introducing excess air. Scrape the sides and bottom of the mixing container to ensure all components are incorporated, but avoid vigorous stirring that could create more bubbles.


5. Apply a Thin Layer of Resin before Pouring

Before pouring your epoxy resin into a mold or onto a surface, apply a thin layer to help break the surface tension. This technique reduces the chances of trapping bubbles during the pouring process. You can pour shortly after this thin pour.

However, a proper seal coat is especially important if pouring on a porous material such as wood, as it will prevent the wood from breathing through the epoxy as it cures. You can brush on a coat using a product such as our Table Top & Art Resin, wait about 4-6 hours until it has hardened, yet is still in a tacky stage (e.g. slightly dent-able with fingernails), and then go on with the main pour. If the seal coat full cures, you will need to lightly sand it with ~180-220 grit, wipe off the dust, and then pour onto it.


6. Use a Heat Source to Remove Bubbles

After pouring your epoxy resin, use a heat source such as a heat gun, torch, or even a hairdryer to remove bubbles. The heat causes the bubbles to rise to the surface and pop. Be cautious not to overheat the resin or your mold, as excessive heat may cause damage.


7. Avoid Trapping Bubbles in Molds

For intricate molds, try to "demold" the resin several times during pouring. This allows trapped bubbles in grooves and tight spaces to escape.


8. Coat Inclusions / Embeddings with Resin

Before placing any inclusions, such as stones or wood pieces, into your epoxy resin project, we also recommend to seal coat them with a thin layer of resin. This helps break the surface tension and prevents them from breathing through the main pours which minimizes bubble formation.


9. Work in Thinner Layers

For larger projects, pour thinner layers to reduce the likelihood of bubbles. This method allows for more effective bubble release, and any remaining bubbles will be less noticeable in thin layers. It also helps you work on larger projects using a product that is made for thinner pours. For example, you could use our Table Top & Art Resin to pour layers up to 1/4" at a time. However, if your project does need a thick pour, get your hands on one of our Deep Pour Epoxy Resin products.


10. Be Patient and Practice

Finally, remember that working with epoxy resin is a skill that improves with practice. Choose the most suitable product will simplify your life a good deal, but these tips will be helpful regardless. As you gain experience, you'll develop a better understanding of how to manage temperatures, mixing techniques, and other factors that contribute to bubble formation. Be patient, practice, and don't be afraid to learn from your mistakes!



Achieving a flawless, bubble-free project with epoxy resin may seem challenging, but with the right techniques and patience, it's certainly possible. By selecting the appropriate epoxy resin product, maintaining optimal room temperature, warming and mixing the resin carefully, and following the tips outlined above, you can significantly reduce the occurrence of bubbles in your projects.

At Magic Resin, we're committed to helping you create beautiful, professional-quality epoxy resin projects. If you have any questions or need assistance with your project, please don't hesitate to reach out to us at We're here to help you bring your vision to life, one bubble-free masterpiece at a time!

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