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How to fix uncured epoxy

Posted by Joel Willis on

We recently got an email from a customer who had an issue with our multi-purpose epoxy where it didn't cure properly. Here is a look at the situation and our response. Hope you like it, and HAPPY CREATING everyone!


Customer email:

Hi I used Multi Purpose mixing by volume, it has been curing in a 68 degree F room for 5 days now. We are trying to stabilize splits in wood used for walking sticks.

We mixed 1 oz of part A and B as directed and the pouring onto wood and left to cure.

The pot leftovers and the resin are sticky on the surface.

Is there a way to save this project?

John Doe


Our response:


    So sorry to hear that! Let's get this walking stick situation fixed. Based on what you're telling me the epoxy should be cured by now with that much time and at that temperature. However there could be a few things going on. I will break this into two sections, 1: What happened with the Epoxy. and 2: How to fix the walking stick. 
First off, here is a troubleshooting checklist for the epoxy:
  • Was at least 2 ounces or more mixed?
  • If mixed in a smaller batch, were the individual parts at or above room temperature when the epoxy was mixed?
  • Was the resin mixed thoroughly using the method described in the directions? ie, was the epoxy mixed for the 3-5 minutes and poured into a second container and the process repeated?
  • Were the sides of the mixing container scraped as the product was mixed?
As a general rule with epoxies, the thoroughness of the mixing process becomes far more important when mixing smaller batches. Epoxy tends to work the opposite way of most liquids, so if you painted a wall in your house with a latex paint, generally the thinner the coat, the faster it cures. With epoxy, the smaller the batch, the slower the cure. The reason for that is that epoxy is a product that uses heat to cure. The heat is created by the chemical reaction of the resin mixing with the hardener. So when there are less chemicals to create the reaction, the smaller and thus slower the chemical reaction is. I am guessing based off your description that you may have mixed a batch that was less than 2 ounces, or the epoxy wasn't mixed thoroughly. 
Section 2: 
So, as for getting your walking stick fixed, here is what you do. You will need to dig out the resin that was uncured and then re-pour. There isn't a way to make the resin cure once its been applied. Some people will say that you can just go over it with more resin, but that almost never actually cures even when mixed properly, and even if it does cure over the top of the uncured resin, the uncured resin will stay uncured which created a weak spot in your finished product. The right way to do it, is dig out the bad resin, sand the wood again, clean the wood with some acetone, and re-pour. Sorry to tell you that! I know that means a lot more work, but there isn't a shortcut on this one...If you know that you properly mixed the product and mixed at least 2 ounces, then I would be more than happy to refund your purchase. Please let us know how the project goes! And let us know if you would like a refund. Thanks!
Customer Service
Old Timer Industries LLC.

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