Free shipping on orders over £29,85 
Shipping Tracking! 
Google
Facebook← Back to How to prevent air bubbles in epoxy resin
If you’ve ever experienced unwanted bubbles spoiling your epoxy resin project, you may be wondering if gently warming resin is the answer. Here’s how warming your resin before use can influence your results for a professional looking, glass-clear finish.
Why Warming Resin Works
Slightly heating epoxy resin before mixing reduces its viscosity, allowing trapped air to rise and escape more easily. Warmer resin flows better, making it less likely for bubbles to form or get trapped during the pouring and mixing process. Many resin crafters find their castings are noticeably clearer and smoother when working with warmed resin compared to mixing it at cold room temperatures.
How to Warm Epoxy Resin Safely
To gently warm resin, place the closed resin bottles in a bowl of warm (not hot) water for a few minutes before mixing. Avoid overheating, as excess heat can start the curing process early or cause uneven results. Aim for the resin to feel just mildly warm to the touch before use.
After warming, use a slow, steady stirring motion to minimise additional air incorporation. Tools such as the Anti Bubble Mixer for Epoxy Resin – Reusable Mixing Tool can further reduce bubble formation by promoting gentle, thorough mixing.
When This Matters Most
Warming resin is especially helpful in cooler working environments, or when your resin has thickened in storage. It’s also a good practice for any project requiring transparent results, such as river tables, clear coatings, or jewellery casting, where visibility of bubbles would be most noticeable.
Related products
Related guides
Using warmed epoxy resin is a simple, effective technique to help achieve beautifully clear, bubble-free results. For more tips on flawless finishes, see our full guide on how to prevent air bubbles in epoxy resin.