How Do I Reduce Bubbles in Epoxy Resin?

Mixing Techniques to Minimise Bubbles

Stir epoxy resin components together slowly and consistently. Vigorous mixing traps air, so use gentle, circular motions to combine the resin and hardener. Pouring each part into a clean, dry container and ensuring you scrape the sides can also help maintain an even blend without excessive foaming.

For best results, use measuring tools designed for resin, such as a graduated measuring cup. This allows for accurate dosing, reducing the need for over-stirring and further protecting against excess air introduction.

Dealing with Surface Bubbles

Once poured, check the surface of your resin for trapped air. You can gently pass a heat gun or blow torch at a safe distance over the top of the resin; the warmth encourages bubbles to rise and pop quickly. For smaller bubbles, a toothpick or pin will help you carefully remove them without disturbing the overall finish.

Allow the resin to self-settle for a few minutes—this helps any remaining bubbles to rise naturally and makes them easier to remove.

Choosing the Right Resin Formulation

Some resin products are formulated for reduced bubble formation, especially those made for jewellery and intricate moulds. For example, Liquidissima epoxy resin features a low-viscosity blend that helps air escape more easily, making it a good option if you’re looking to minimise imperfections in detailed work.