Epoxy resin is a liquid polymer used to make strong, waterproof adhesives that can be used to fill in gaps and cracks or repair items.
Epoxy resin is commonly used for crafts, furniture making, jewelry making, and home repairs. Epoxy resins have many different uses because of their strength and durability, but it’s vital that you mix the epoxy resin without bubbles so it won’t be weaker or more prone to damage because of air bubbles trapped in the mixture.
Bubbles form when air gets trapped inside the liquid epoxy resin before it cures.
How do you mix epoxy resin without bubbles?
You don’t need to be a chemist to get a good result. All you have to do is mix slowly. Most bubbles that appear in your cured resin are the result of mixing too fast and/or for too long.
By mixing slower, you can let the bubbles rise to the surface and escape.
Table of Contents
- How do you mix epoxy resin without bubbles?
- How do you stop bubbles when mixing epoxy?
- How do you make resin without bubbles?
- How do you get rid of bubbles fast?
- Can you use a hair dryer to get bubbles out of resin?
- How do you get rid of air bubbles?
- Can you use a lighter to get bubbles out of resin?
- How do you get resin bubbles out without a torch?
How do you stop bubbles when mixing epoxy?
The most common way to stop bubbles when mixing epoxy is to use a torch. But, there are other ways to get the job done, too.
If you plan on using a torch, it’s best to purchase a mini handheld butane torch. When using a torch, you’ll want to move it slowly across the surface of your project.
As you do so, the heat that it creates will pop any bubbles that are forming in the resin while also leveling out its surface.
If using a heat gun or blow dryer doesn’t sound appealing to you and if you don’t have access to a vacuum chamber or don’t want one you can also use something called a surface tensioner (also known as an anti-foaming agent) in your resin mix before curing.
Surface tensioners are typically used for cutting foam and removing bubbles from liquids like gas and oil, but they do work in epoxy resin projects as well.
If none of these options are available or accessible for you at this time and if your project is particularly large (like pouring an entire countertop), you can try this tip: mix your epoxy slowly! And pour it very slowly as well.
Mixing your epoxy slowly reduces air entrapment while pouring slowly allows air bubbles time to rise up through the liquid before solidifying into place.
If none of these tips helped avoid creating bubbles during mixing or pouring your epoxy resin mixture, try letting it cure longer than specified by its minimum cure time on its product data sheet (PDS).
Most products will have their PDS information printed onto their containers’ labels; however, some brands may require that you look up their website online for more specific information about their products’ curing times and temperatures.
How do you make resin without bubbles?
There are many ways for you to avoid having bubbles in your resin. You can mix slowly and thoroughly, pour in stages, pour from a height, use a vacuum, use a heat gun, or blow torch.
You might also try pouring slowly, using a resin shaker or mixer, or using a resin degassing chamber.
The most common method is to pour slowly and at about 10 inches above the project.
How do you get rid of bubbles fast?
- You can use a heat gun to pop bubbles in your resin. This is one of the most popular methods as it requires minimal effort and works well. As a bonus, this method also helps with leveling the resin so you’re killing two birds with one stone.
- You can pop bubbles using a hairdryer. I’m not sure why this works but it does! I like this method, especially when curing smaller pieces (like dollhouse miniatures or jewelry) because it keeps my hand steady so I don’t risk spilling resin all over the table!
- You can pop bubbles with a lighter or a torch. It may seem crazy to set your resin on fire but this is actually the BEST way to get an absolutely bubble free surface! Use short strokes and move quickly though – you want to burn off the oxygen that is causing the bubble rather than melting your piece.
- Blowing on bubbles through a straw will also help get rid of some of them as well (works especially well for cardboard or 3D printed molds). You can also use a spray bottle (with water in it) to spray lightly at some of the larger air pockets too.
Can you use a hair dryer to get bubbles out of resin?
Nope, sorry! It won’t work. The reason is that the air will not be able to penetrate the resin. It will just sit on top and form a hardened film (that you’ll have to sand off later if it’s thick enough).
The art of getting rid of bubbles is a tricky one. You can use a variety of tools including syringes and paintbrushes, but they all have their pros and cons:
Paintbrushes can leave brush strokes, which may or may not be desirable;
Syringes can be great for smaller areas and tight spaces, but they’re hard to maneuver in larger ones;
Blowtorches are easy to use and effective, but you need to be careful with them as they do create heat
How do you get rid of air bubbles?
You can purchase a vacuum chamber online that will suck out most of the air bubbles from your resin. This is ideal for art projects that require absolutely no bubbles, such as resin artwork or when you are embedding objects into your resin.
Another technique you can use to eliminate air bubbles is to thoroughly mix your resin, then allow it to sit for about two minutes.
This technique allows most of the tiny air bubbles to rise to the surface and pop on their own. You can take it one step further by gently heating up your mixed epoxy after allowing it to sit for two minutes.
Use a torch and move the flame back and forth over the top of your epoxy for about two minutes. This will make any remaining air bubbles rise up and pop!
Can you use a lighter to get bubbles out of resin?
There are a few methods to remove bubbles from your resin, but the best one is using a heat gun. All you have to do is turn on the heat gun, hold it about 6 inches above your piece, and sweep it back and forth until all of the bubbles have popped.
If you don’t have a heat gun handy, you can also use a stir stick or a spatula to pop the bubbles by moving them around on top of your resin.
This will break up any larger bubbles that might be trapped underneath your surface. If you’re mixing epoxy in large batches as I did with my concrete countertops then this is probably not going to work well because there’s so much volume for such small movements!
Another way to pop those pesky air pockets is with an alcohol-based hair spray (NOT water-based).
A quick spritz over top will cause an immediate reaction and make all of those little air cells bubble up to the surface where they can be scraped away easily before setting into place forever!
How do you get resin bubbles out without a torch?
- The first thing you can do to get rid of bubbles before they become a problem is to use a heat gun or a hairdryer. This can be useful when the resin has already been poured into the mold, and you notice that bubbles are rising to the surface. You should make sure that you only hold it close enough to warm up the surface of the resin, but not so close that it will cause its temperature to rise (you don’t want it to become hot).
- Another thing that you can do is use a paintbrush (or even just your finger) to brush over the surface of the resin while it’s still in liquid form. This helps release any trapped air from your piece and makes sure that no bubbles are created in the future.
- It’s worth noting that sometimes, even after doing everything right with your pouring process – letting gravity work its magic and using an epoxy roller on top – there will still be some pesky air pockets left behind as your project cures overnight or over several days time! Luckily there is one more trick up our sleeve for this scenario: waiting until cured before removing all bubbles with sandpaper/Dremel tooling (if necessary). This takes patience but removes those tiny imperfections while leaving behind vibrant color undertones from deep within layers beneath crystal clear glassy coating!
So, to recap:
- Those tiny bubbles in your resin are frustrating, but they can be dealt with. And the first step toward getting rid of them is understanding how they’re formed and why you get them.
- The more thoroughly you stir your resin and hardener, the less likely you’ll have a problem. Letting it sit will also cause a lot of bubbles to rise.
- You can use pressure from a brayer or other tool to get rid of any remaining bubbles. Or if you want to use heat, that’s a good option as well. Just make sure not to heat too much!
The bottom line is that if you mix your resin properly—and give it time—you can avoid those pesky bubbles ruining your fun DIY project!