How Do I Reduce Air Bubbles in Resin Crafts?

Why Bubbles Appear and How to Minimise Them

Air bubbles usually form while mixing the resin and hardener, especially if stirred quickly or with vigorous movements. The key to fewer bubbles is slow, steady mixing and pouring. Once mixed, allow the resin to rest for a few minutes in the container. This pause lets many of the bubbles rise naturally to the surface, reducing the number that end up in your finished piece.

• Mix slowly for at least 3-5 minutes
• Let the mixed resin stand before pouring
• Use a wide, shallow container to help bubbles escape

Popping Surface Bubbles: Tools and Techniques

After pouring resin into your moulds, the final step is dealing with any surface bubbles. A quick pass with a craft heat gun or small torch gently encourages bubbles to pop. Hold the heat source a few inches above the resin and keep it moving to avoid overheating one spot. For detailed projects like those in our Resin Geode Coaster Starter Kit, this finishing touch ensures a glass-like finish.

When This Matters Most

Reducing bubbles is vital for projects where clarity and professional appearance are important, such as souvenir coasters or decorative trays. Clear resin shows every trapped bubble, so using these techniques is especially helpful when making keepsakes, gifts, or pieces that highlight embedded materials and translucent colours.