Why didn’t my resin cure?
This is a problem that resin newbies and seasoned professionals alike run into from time to time. Here are a few trouble areas you should evaluate in case you’re asking yourself, “Why didn’t my resin cure?”
1. How old is your resin?
Only purchase enough resin that you can comfortably use within half of the expected shelf life. Eventually, moisture may collect in your bottles, which will affect how it cures.
2. Are you keeping your resin in a climate-controlled environment?
If the temperature changes a lot, moisture will collect on the inside of the lids which can drip into your resin and effect curing.
3. Did you measure it properly?
Measuring it properly means using graduated mixing cups to make sure you get accurate measurements.
4. Did you mix it thoroughly?
5. Were your mixing cups dry?
If you reused them, was there any leftover residue? Here’s how to clean resin tools for another use.
6. Are your inclusions completely dry?
For example, while pastel powders can add some great colors to inclusions, they also attract moisture. If you sealed items with glue before putting them in your resin, are you sure they were dry before adding to your project? Here’s how I like to seal items before including them in resin.
7. What was your room temperature?
Resin cures best in a room temperature of low 70’s F. Make sure to mix your resin at the right temperature.
8. Did you mix it in the proper ratios?
Always read the directions! Every resin has its own mixing directions. Do not assume they all mix the same.
9. Were both components of the resin from the same manufacturer?
You cannot use one brand’s resin with another brand’s hardener and expect the mix to cure.
10. Did you mix the minimum recommended amount?
When resin and hardener are mixed together, a chemical reaction causes heat production. This heat is what makes the mixture get hard. You have to mix together a specific amount of each component to generate enough heat for the resin to cure. Hint: If it’s a resin sold in the Resin Obsession store, we’ve got all that information for you in our resin buying guide.
11. Are you using a latex mold?
Sometimes, resins do not like latex and may not fully cure.
12. Was your mold dry before pouring?
Make sure any mold release agent is completely dry before pouring resin into that mold.
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