How do I get rid of bubbles in corners?

Why Do Bubbles Form in Resin Corners?

When pouring resin, air can become trapped in corners, especially in moulds or around design features. This is made more likely if resin is poured quickly or if the mould isn’t gently prepared. Even high-quality resins can form bubbles in these areas as air moves to the surface.

Techniques for Bubble Removal

The most reliable method for eliminating bubbles is to use a heat gun or a torch lightly across the resin’s surface within minutes of pouring. This encourages trapped air to rise and pop. For corners and tight spots, guide escaping bubbles with a stick, toothpick, or cocktail stick before the resin begins to set. Avoid overheating any one area to prevent resin distortion.

• Work promptly—most bubbles rise within the first 10 minutes after pouring.
• Use slow, deliberate passes with the heat source, keeping it at a slight distance to avoid burning.
• Revisit the corners with your stick or toothpick until no more bubbles appear.

Choose a resin with the right viscosity for your project. Ultra-high viscosity resins such as Art Pro Deluxe are easier to control, minimising bubble formation due to slow spreading.

When Bubble Removal Really Matters

If you’re creating coasters, trays, or table edges where clarity and flawless presentation are essential, precise bubble management is crucial. Projects for display or professional use benefit strongly from careful finishing work in the corners.