Avoid bubbles in Epoxy Resin

epoxy resin bubble tip


Avoid bubbles in Epoxy Resin

How to avoid bubbles in epoxy resin? There are many explanations for the formation of bubbles in epoxy resin. It might come from the mixture of part A and part B. Stir with a 1 inch wide flat spatula is your best chance to avoid bubbles.While mixing, it is recommended to perform slow figure eight shapes or irregular motions in the epoxy instead of a fast-circular motion. This will allow the resin and hardener molecules to encounter each other in different directions instead of running around in circles.


  • Avoid using wooden stick to mix resin.
  • Mixing too fast, because it will cause more air bubbles to form in the mixture.
  • Leave the mixture to degas before pouring it over the surface to be covered. Be careful, the more you wait after mixing part A and Part B, the thickener the resin will become, especially with FAST SETTING epoxy such as our CHILL SEALER, CHILL FIX, CHILL DIAMOND FAST and CHILL CLEAR.

How to avoid bubbles in epoxy resin?

It might come from the surface to be covered. Some materials (plaster, wood) are more porous or contain humidity which makes more air bubbles rising to the surface. It is recommended to apply a thin layer of resin as a sealer. In this case, there is no need to wait until this layer is completely dry before pouring the resin. It is even recommended to apply the resin while the sealing layer is still a little bit sticky/tacky.

(In French, we say, the resin is “amoureuse”)

Once the resin is poured, any surface bubbles that haven’t burst may be broken using a propane torch. Set the flame to the lowest position and hold it 15 cm from the surface. A hair dryer can be used as an alternative.