Why does my epoxy keep bubbling?

Epoxy is an incredible adhesive and coating material. It cures quickly, bonds well to a variety of substrates, and is fairly easy to apply.

The main drawback of epoxy is that it can be very finicky to work with. Bubbles are especially dangerous because they leave the liquid surface uneven and can cause your project to fail.

The best way around this problem is prevention: keep your surface clean, don’t overuse mixing cups or stir sticks (or use disposable ones), coat in an area that’s free from drafts so the epoxy doesn’t dry too quickly, etc.

Here are some tips for dealing with bubbles after you’ve applied your epoxy:

How do you keep epoxy from bubbling?

You can use a heat gun to remove bubbles. Heat guns are commonly used in the paint industry, and they are often used to smooth out imperfections in automotive finishes.

Heat guns use hot air that is blown over an object. This can be effective at smoothing out epoxy before it dries, especially if you work quickly and don’t allow the epoxy to dry in between applications of heat.

If you have just finished applying some new coats of epoxy, wait about 30 seconds for them to dry slightly before using a heat gun on them. This will prevent any issues with over-heating or melting your project!

How long does it take for epoxy to stop bubbling?

The curing time is dependent on a variety of factors including the temperature and amount of epoxy used. If your project is small, you should expect it to be cured in about 24 hours.

However, larger projects might need more than 24 hours (or even a few days) to fully cure. As with all things that involve paint or resin, your best bet is to test out these variables yourself so that you can find out what works best for you and your situation.

When determining whether or not your epoxy has fully cured, one way is by checking its color–if the surface has taken on a yellow tint when compared against an un-cured sample then it’s probably ready to apply another layer or finish your product

How do you fix bubbles in cured epoxy?

  • Don’t heat cure epoxy in a microwave.
  • Don’t heat cure epoxy on a stovetop.
  • Don’t heat cure epoxy on a hot plate.

If you want to avoid bubbles in your cured epoxy, don’t heat cure it!

How do you get rid of small bubbles in resin?

  • Mix the resin slowly before pouring it into your mold.
  • Pour the resin slowly, but don’t let it run down the sides of the mold, or you’ll get drips that can cause bubbles in your finished product.
  • Use a torch on low heat to cure any remaining bubbles after you pour in your resins; it may take as long as an hour depending on how much resin was used and how big those bubbles were!

Can you use a hair dryer to remove bubbles from resin?

You can use a hairdryer to remove bubbles from resin. You can also use a heat gun, but this is risky because it creates too much heat and could melt the epoxy.

The best method is to use a hairdryer that has cool settings and limit its use to 30 seconds per application.

How do you fix epoxy mistakes?

Epoxy mistakes are inevitable. There will always be a time when you don’t mix your epoxy properly, or when it sets too fast, or when you get epoxy on your clothes. Luckily, there are ways to fix all of these problems!

Mixing epoxy improperly is a common mistake for beginners who are unfamiliar with what to do with this material. If your epoxy spreads across the surface rather than staying in its intended shape, this means that either:

  • The ratio of hardener to resin was off (too much hardener)
  • You didn’t mix it well enough

If this happens and you have time before the epoxy starts setting up (about 20 minutes), simply re-mix and try again! This can make all the difference if done correctly; just remember not to add more hardener than necessary–you should always start by mixing equal parts resin and hardener together first before adding any additional chemicals into the mixture.

How do you fix epoxy dimples?

  • Turn on your heat gun, torch, or hairdryer.
  • Hold the object at a 45° angle and apply the heat from above. The epoxy will begin to shrink and pull away from the surface of your object.
  • If you’re using a torch, keep moving it around so that you don’t overheat one area more than another.

Can you pour epoxy over cured epoxy?

Yes, you can pour epoxy over cured epoxy. However, if you do this, the layers must be thoroughly mixed so that there is no delamination of the layers. Also, when pouring on top of the old layer (or layers), make sure to use a thinner mix than what has already been applied so that it’s not too dense and doesn’t cause bubbles in your new layer!

If you’re looking for an easier way out, try pouring directly onto cured epoxy! It will get rid of bubbles for sure!


Hopefully, you now understand the reasons why your epoxy may be bubbling, and what to do about it. To recap:

  • Bubbles are a natural part of the curing process and not a sign that there is something wrong with your epoxy.
  • The bubbles will eventually disappear, but if they don’t go away after 24 hours leave them alone. Don’t try to pop them or remove them any other way! They will dissipate on their own over time.

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