The Secret You Need to Know About Epoxy Resin Casting

Beginner's guide to epoxy resin casting

You’ve seen cool pictures where someone shows what they’ve made with epoxy casting resin. Now, you’ve decided to give it a try.

But where do you get started? There is sooooo much information out there it’s easy to get lost.

Lost like you’ve been down the YouTube rabbit hole so long that your cat is on the phone to her lawyer asking how to get at your money. (Good kitty cookies can be expensive.)

And you’re still no closer to understanding anything about epoxy resin casting.

It’s not your fault.  I’ve been there too. While 15-second videos are fun to watch, they aren’t going to get you where you want to be.

How about I take you on the not-so-scary, bunny slopes version of casting with epoxy resin?  (and tell your cat she’s wasn’t getting your money anyways)

Let’s start with what is epoxy resin casting?

There are three words in that question that we need to talk about:

First: Epoxy

Epoxy is a class of synthetic thermosetting polymers containing epoxide groups. (That won’t be on the test, but might be useful if you’re ever a Jeopardy contestant.) It is one of the most widely available resins. I also find it’s the easiest to use resin, especially for beginners. It has a long working time and simple mixing instructions.

Second: Resin

Resin is a common term defining a class of organic substances that may be natural or synthetic, thermoplastic or thermosetting. (That’s not on the test either.) You use two-part resins with hardeners to form a solid material.

Third: Casting

This unique resin formula mixes in a thin consistency to allow bubbles to escape quickly. Once mixed, you can pour it into something with ‘sides’ like a mold, open wood spaces, or something similar.

When should you use epoxy casting resin?

Casting resins are excellent for the times you need to fill an open space deeper than 1/8 inch. You can pour the resin in thick layers (sometimes up to 2 inches deep), and they cure hard and durable. Casting resin is excellent for mold projects and deep pour epoxy river tables.

Which epoxy casting resin should I use?

Well, it depends on what you’re going to make and what kind of results you want.

For projects where you need three ounces or less (total) of mixed resin, use the Resin Obsession super clear resin. It cures hard and clear and is ready to demold in 8 to 12 hours.

For resin mold projects where you want to pour more than 3 ounces at once, use the Resin Obsession deep pour epoxy resin.  It works perfectly in thick pour resin projects like river tables and deep molds. You can mix up to three gallons and pour up to two inches deep at once.

Now I’m not going to kid you here, our epoxy resin formulas aren’t the cheapest on the market. And if you only want to make a one-off project, they’re probably more than you need. But if you want something crystal-clear that will stay that way for a long time, you’ll want to give them a try.

Besides, I’ve used these resins for years. I can answer your questions about epoxy resin casting a lot better than the rando stock clerk or customer service agent retyping from a script.

Can you color epoxy resin for casting?

I can’t say enough of a big YES here. You can keep your resin clear, but coloring resin is one of the things that makes epoxy casting so awesome.

To color resin, here are the steps:

Step 1: Choose your resin color

silicone molds for resin
You will get the best results coloring your epoxy casting if you use colors designed for resin. They don’t affect curing, keep their tones, and color resin evenly.

Step 2: Add your color


candy cane silicone mold

Add a small amount of color (less than you think you will need), then stir. Of course, you can always add more, but it’s hard to take it out if your color ends up being too dark.

Step 3: Use the resin

pouring colored resin into a silicone mold

Pour your colored epoxy into your space.

What’s the easiest way for a beginner to use epoxy casting resin?


silicone molds filled with resin

Silicone molds for resin are the perfect way to get started. Beginners can make something exceptional with resin molds.

How do you mix epoxy casting resin?

Step 1: Measure Part A (resin) and Part B (hardener) into separate cups.

Step 2: Mix the two parts together until it’s clear and free of streaks.

Step 3: Pour into the mold or space.

⭐️ BONUS:  We have a step-by-step guide on mixing resin if you want extra help. (It includes pictures and a video too.)

What else will I need besides resin?

You will need mixing cups and utensils, safety supplies, and other items specific to your project. I’ve got a beginner resin supply checklist you can download to have handy as you’re gathering your resin supplies.

What can you make with epoxy casting resin?

I’m so glad you asked. Here are a few resin crafts to get you started.

Resin coasters

Resin coaster with bumper pads

The hardest part about this project is deciding if resin coasters are more fun to make or more fun to gift. Either way, you’re going to love what you can make with resin coaster molds.

How to make resin coasters

Resin keychains

resin paw print keychain charms

Calling all animal lovers. Here’s your next resin project. Pour resin into a mold, then add keychain hardware. Not only does this resin key chain fit nicely in the palm of your hand, but it’s easy to find in a purse or backpack.

How to make a resin keychain

Resin jewelry


purple resin and wood pendant

Looking for a way to turn nature into jewelry? Resin can be your secret weapon. Learn how to combine wood scraps with resin to make pendants.

How to make wood and resin jewelry

Looking for more help with epoxy resin casting?

It’s why I wrote the book, Resin Fundamentals.  For less than the cost of a resin kit, you can buy the book where I share the essential details I’ve learned in fifteen years of creating with resin. Buy the book now and get a download link to your email in minutes.


Unpublished Blog Posts of Resin Obsession, LLC © 2022 Resin Obsession, LLC

Like this post? You may be interested in  How To Resin A Painting Without Breaking A Sweat

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