How to measure and mix epoxy resin and hardener in five easy steps

How to measure and mix epoxy resin and hardener in five easy steps Epoxy resin comes as a two part system: the Part A resin and the Part B hardener (also known as a catalyst). Knowing how to measure and mix epoxy resin and hardener is important to making sure your resin cures as expected! Here are the steps to make sure you have resin curing success every time.

Step 1 Clearly understand the mixing directions of the epoxy resin you are using. Not all resins mix the same!

It’s important to note several things when mixing epoxy resin and hardener: *Does it mix equal parts A and B or does it 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?

These resin mixing instructions are important to making sure you get the resin curing results you want.

Step 2 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.

For example, let’s say you are working with a resin mold that needs 1 1/2 ounces of resin and you are using the Neo Paints super clear resin. This resin mixes 2 parts A to 1 part B by volume, so you will need 1 ounce of Part A and 1/2 ounce of Part B.

Step 3 Gather the resin supplies necessary to make sure you get accurate measurements on your epoxy resin and hardener. Make sure your resin work area, along with your epoxy resin and hardener, are at the ideal temperature.

One ounce and ten ounce graduated mixing cups are an easy way to accurately measure

your resin kit components.

Pro tip: You may see other people using their resin kit lid caps, plastic drinking cups, kitchen spoons and other miscellaneous items to measure their resin. I’m sure that

works — at least part of the time. When I’m troubleshooting resin curing problems, oftentimes it comes down to someone not measuring their resin kit components accurately. The best way you can do that is with graduated measuring cups designed for epoxy resin.

Of course we can’t ignore resin safety here either. At a minimum, you need to wear gloves and work in well-ventilated area.

Step 4 Now it’s time to pour your resin and hardener into separate cups. Measure exactly and resist the urge to add extra hardener. Doing this makes your resin heat up too quickly and shortens the pot time of your resin.

Pro tip: Why use separate cups for the two components? In case I overpour either the epoxy resin or the hardener, I can pour it back into its respective bottle and not waste it.

My other 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 Pour the two parts together and stir well. Scrape the sides of the cups and your stirring utensil several times during the process.

You will likely notice your resin having a wavy appearance when first mixing the two parts. This is normal. The mix should go clear when you are done combining.

Pro tip: My rule is to mix the resin for ten percent of the resin’s pot time. If I’m working with a resin with a thirty minute pot time, that means I will mix the resin and hardener together for three minutes.

If you like to reuse your resin supplies, then you will love that you can clean your resin mixing cups for another use.

And one more pro tip: Once you start this process, set a timer. It is a great reminder to focus on what you are doing and not lose track of time. You want to get all your resin used before it starts to cure!

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