Wait. I changed my mind.
I WANT to be over the top, Real Housewives, dramatic here.
Mixing resin is beyond pretty important. In fact, it’s EVERYTHING to your resin success.
You won’t make anything worth wearing, using, displaying, or selling until you can do this right.
So let’s start with resin mixing basics that apply to all epoxy resins.
1. Epoxy resin comes in a two-part system: the Part A resin and the Part B hardener. They go together like a lock and key. Just like you have to use a specific key to unlock a specific door, you have to use the hardener specific to your epoxy.
2. When you buy an epoxy resin kit, it will come with both parts. You should never have to buy them separately.
3. No ‘one size fits all’ resin mixing instructions exist. (more on that in a minute) While you want to use the same techniques when mixing your resin, there are specific details for each epoxy kit.
Now, let’s get into the five steps for mixing resin.
Step 1: Read the directions
I get that creatives like to ‘wing it.’ But mixing resin is not one of those times. (Save that for pouring resin on a canvas instead.)
Clearly understand the mixing directions of the epoxy resin you’re using.
Remember what I said above?
Not all resins mix the same.
There are three resin mixing details you need to know for your epoxy resin:
*How much Part A do you mix with Part B? Does it mix equal parts A and B, or mix two parts A to one Part B (or perhaps even something else)?
*Does it mix by weight, volume, or either?
*What are the minimum and maximum mixing amounts of the resin?
You’ve got to know these. These resin mixing instructions are essential to make sure your resin cures.
Step 2: Figure out how much resin you need
Determine the total volume of mixed resin you need for your project. From there, break it down into the amount of Part A resin and Part B hardener you need to mix together.
I get it. Math is hard. So let’s walk through an example.
Let’s say you are working with a resin mold that needs 1 1/2 ounces of resin, and you are using the Resin Obsession super clear resin. This jewelry resin mixes two parts A to one part B by volume, so you will need 1 ounce of Part A and 1/2 ounce of Part B.
Ah, but how did I know much resin to add to the mold?
There are a few ways you can figure that out.
The easiest way is with the Resin Obsession resin calculator.
But there are a few other resin hacks for this too.
⭐️ BONUS: Here’s how you know how much resin you need.
Step 3: Gather your supplies and prep your area
You must use mixing cups that let you measure your resin liquids accurately. That means you need lines on the cup to see what you’re doing.
Like on these resin mixing cups.
Now, I know what you’re thinking.
You’ve watched lots of Tik Toks and Youtubes where people use caps, party cups, spoons, and other things to measure their resin.
And I’m sure that works. Sometimes.
I don’t know about you, but my time is precious. I need to know my resin will cure every time. And that means using cups that I can use to measure liquids precisely.
Now that you’ve got your mixing supplies, you must ensure your resin kit and crafting area are warm.
But not too warm. You need to work in a space that’s in the low 70s F. (It’s resin goldilocks’ version of just right.)
And your resin needs to be warm too. You can learn more about that here:
⭐️ BONUS: What is the best temperature for resin?
And please, don’t ignore resin safety precautions. You need to wear gloves and work in a well-ventilated area.
This is an important topic that deserves its own article.
⭐️ BONUS: How to use epoxy resin safely.
Step 4: Measure the liquids
Now it’s time to pour your resin and hardener into separate cups. Measure precisely.
Why use separate cups for the two parts? Suppose you overpour either the epoxy resin or the hardener. You can pour it back into its respective bottle and not waste it.
💡 Pro tip: Pour from one bottle, then recap before pouring from the other bottle. If you uncap both bottles at once, you risk switching the lids. You don’t want to cure your bottles of epoxy resin and hardener shut. 🤦♀️
Step 5: Mix
Pour the two parts together and stir well. Scrape the sides of the cups and your stirring stick several times during the process.
💡 Pro tip: Once you start this process, set a timer. It is a great reminder to focus on your work and not lose track of time. You want to get all your resin used before it starts to cure.
Your resin will look wavy when you start mixing. This is normal. As you mix, the streaks will disappear.
This is what I’m talking about:
Here’s what clear epoxy looks like after mixing the resin and hardener for about 15 seconds.
This is what the same resin looks like after stirring for two and a half minutes.
💡 Pro tip: Undermixed epoxy is the number one reason for sticky resin. Focus on this part.
Now you are ready to use your resin! 🎉
Learn all about mixing resin for jewelry, crafts, and resin art in under three minutes:
What else should you know about mixing resin?
Can you reuse resin mixing supplies?
Yes. You can clean your resin mixing cups for another use. Here’s how:
What about bubbles?
While it’s always best to stir your resin to prevent bubbles, sometimes it is unavoidable. Especially if you’re mixing large volumes, like for making an epoxy table.
⭐️ BONUS: Get my best tips for avoiding resin bubbles.
Should you let your resin sit before using it?
I don’t. Some crafters will do that to let bubbles rise to the surface before pouring resin. But your pot time is ticking. That means it’s fewer minutes you’ll have to use the resin before it starts to cure. I’d rather use it immediately than give myself less time and rush through a project.
What about mixing your resin and hardener by weight instead of volume?
Yes, you can do that. But…
Resin and hardener don’t weigh the same by volume. That means you’ll use up your hardener faster when you measure by weight instead of volume. And you run into the chance your resin overheats.
Does the stirring utensil matter?
Yes. Popsicle sticks and tongue depressors are made of wood. Wood can release bubbles into your resin. It’s why I use plastic stirring sticks. And you can clean them to use over and over.
When should I add colors to resin?
In general, you can add colors to the resin after it’s mixed. But liquid resin colors can have their own specific instructions. Resin doesn’t like water, so you want to make sure you don’t affect curing.
⭐️ BONUS: How to color clear epoxy resin so it looks fantastic.
Why isn’t the resin clear?
Isn’t that frustrating?! There can be a few reasons for this.
⭐️ BONUS: Four reasons why your resin is cloudy.
Want to get to resin expert status quickly?
Then be sure to get your copy of Resin Fundamentals. This ebook has everything beginners need to know to get you from confused to confident with mixing resin (and more!) in a couple of hours. Buy now, and a download link arrives in your email in minutes.
Unpublished Blog Posts of Resin Obsession, LLC © 2023 Resin Obsession, LLC