Ways to Get Rid of Bubbles

#1 – HEAT YOUR RESIN ONLY NOT HARDNER
Warm the resin by dipping it into a bowl full of warm, NOT hot, water.

Warming the resin, and not the hardener, allows the resin to mix better with the hardener. A warmer room results in fewer bubbles, too.

#2 – MIX BOTH RESIN AND HARDENER SLOWLY.
Don’t rush! Take your time mixing. Take the full 3 to 5 minutes to carefully and slowly blend them for the first mix and an additional 3 minutes for the second mix.

* Stirring too fast can cause many air bubbles to occur, and they can be hard to get out.

#3 – WAIT A FEW MINUTES AFTER YOU’VE COMPLETED MIXING THE RESIN AND HARDENER.
This allows the resin to begin popping on its own - (degassing)

* Remember this does cut into the pot time (the working time you have before the resin hardens too much to work with).

#4 – STIR UPWARDS SLOWLY AND BRING SOME OF THE LARGER AIR BUBBLES TO THE SURFACE
Blowing on the surface as you do this can help

#5 – YOU CAN USE A STRAW TO BLOW ON THE SURFACE TO TARGET SPECIFIC BUBBLES.
Especially in thin layers, this is effective.

#6 – USING A HAND LIGHTER
Be careful don’t keep the flame on the resin for too long allowing the resin to cool. Make sure to do it quickly and after you’ve let your work de-gas on its own. (with smaller projects)

Caution: If you overuse the flame, the cured product will have a grainy, almost sticky texture on the surface instead of a smooth, slick surface.

#7 - IF YOU’RE USING CASTING
Use a toothpick to pop the bubbles from corners and then you can blow on the surface or use your hand torch.
You need to physically move them with a toothpick toward the center of the mold to pop them.

#8 WORK IN THIN LAYERS.
When working with thin layers, fewer bubbles tend to develop and easier to remove.

* After pouring your epoxy, it is common for air bubbles to form. Bubbles can continue to develop for 60 minutes after the curing process has begun. The most efficient way to get rid of them is to run a blowtorch over the surface of your resin. None of these tips are required, but using a few or all of them will help you in getting fewer bubbles.

Articles in this section